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Microwave absorbing materials



More informations

The microwave absorbers, usually for RF, for simplicity can be divided into two categories:

FOR ANECHOIC CHAMBERS, for antennas or open space. They work on the principle of gradual impedance transition, they are of pyramidal shape for anechoic chambers. They are often used to reduce the secondary lobes or unwanted couplings, for example on radar antennas, in this case they are more than 1 cm thick.
FOR ENCLOSED SPACE OR CAVITY, a common metal box acts as a cavity excited by secondary propagation modes, for very high frequencies (eg, microwave) or in large boxes, the RF circuit will tend also to self-oscillate. Since no box is identical, in size, shape, frequency of use and exciting mode, to another, it is very difficult to determine in advance what can be the propagation mode associated with that particular frequency.

The absorber inserted into the cavity is designed to attenuate the resonance peaks by changing the characteristics of the cavity and the phase of the reflected signal, moreover being made up of carbon it will tend to deteriorate the Q of the cavity in order to decrease the self-oscillations in resonance peaks. For optimum operation this absorber must be laid on a metal part (cover). As a general rule in an absorber as thickness is increased the minimum operating frequency is
lowered but increase costs, another important quality that a good absorber must have is a poor conductivity to prevent short circuits if it falls on the components. The MAS... and MAF-3A absorbers are only used in cavities (metal boxes) and placed on a metal plane, they are provided, for easy installation, of a self-adhesive film. Types MAF-10A and MAF-19, thanks to the big thickness and the fact that they are multilayer, are also suitable as absorber in open space, eg to reduce the lobes on the antennas, this two types have also high attenuation.

Click here to see our article published on VHF Communications 4-2004 about microwave absorbers

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Emerson & Cuming ECCOSORB LS-22 Microwave foam absorber sheet
Microwave foam absorber sheet
Order code: LS22-32X45
Microwave foam absorber sheet

Emerson & Cuming ECCOSORB LS-22
Conditions: N (The product is brand new)
Reflection loss: 7.4 dB @ 3 GHz, 14.9 dB @ 10 GHz
Minimum working frequency: 4 GHz
Temperature range (°C): -70 / +93
Electric resistance: ~KΩ
Absorbing material: soft and flexible urethane foam loaded with coal
Thickness: 6.35 mm (0.25 in)
Sheet size (metric): 32 x 45 mm
Sheet size (inch): 1.8 x 1.3 in
With adhesive film: No
Go to product page
LS22-32X45
Order code: LS22-32X45
Emerson & Cuming ECCOSORB LS-... 
Stock: 584 pcs
Price each
$1.03
Volume discounts
 10+
$0.92
 30+
$0.87
 100+
$0.82
 250+
$0.76
(VAT tax not included)
Minimum: 1
Multiple: 1
Compare
Emerson & Cuming ECCOSORB LS-22 Microwave foam absorber sheet
Microwave foam absorber sheet
Order code: LS22-35X35
Microwave foam absorber sheet

Emerson & Cuming ECCOSORB LS-22
Conditions: N (The product is brand new)
Reflection loss: 7.4 dB @ 3 GHz, 14.9 dB @ 10 GHz
Minimum working frequency: 4 GHz
Temperature range (°C): -70 / +93
Electric resistance: ~KΩ
Absorbing material: soft and flexible urethane foam loaded with coal
Thickness: 6.35 mm (0.25 in)
Sheet size (metric): 35 x 35 mm
Sheet size (inch): 1.4 x 1.4 in
With adhesive film: No
Go to product page
LS22-35X35
Order code: LS22-35X35
Emerson & Cuming ECCOSORB LS-... 
Stock: 478 pcs
Price each
$1.03
Volume discounts
 10+
$0.92
 30+
$0.87
 100+
$0.82
 250+
$0.76
(VAT tax not included)
Minimum: 1
Multiple: 1
Compare
Out of stock
  Microwave foam absorber sheet
Microwave foam absorber sheet
Order code: MAF-10A-10X20
Microwave foam absorber sheet

Conditions: N (The product is brand new)
Reflection loss: > 10 dB @ > 5 GHz, > 18 dB @ > 7 GHz
Minimum working frequency: 3.5 GHz
Temperature range (°C): -56 / +130
Electric resistance: ~MΩ
Absorbing material: soft and flexible foam loaded with coal
Thickness: 10.0 mm (0.394 in)
Sheet size (metric): 10 x 20 cm
Sheet size (inch): 4 x 8 in
With adhesive film: Yes
Go to product page
MAF-10A-10X20
Order code: MAF-10A-10X20
 
Stock: 0 pcs
Price each
$19.03
(VAT tax not included)
Minimum: 1
Multiple: 1
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finishing
  Microwave foam absorber sheet
Microwave foam absorber sheet
Order code: MAF-10A-20X20
Microwave foam absorber sheet

Conditions: N (The product is brand new)
Reflection loss: > 10 dB @ > 5 GHz, > 18 dB @ > 7 GHz
Minimum working frequency: 3.5 GHz
Temperature range (°C): -56 / +130
Electric resistance: ~MΩ
Absorbing material: soft and flexible foam loaded with coal
Thickness: 10.0 mm (0.394 in)
Sheet size (metric): 20 x 20 cm
Sheet size (inch): 8 x 8 in
With adhesive film: Yes
Go to product page
MAF-10A-20X20
Order code: MAF-10A-20X20
 
Stock: 1 pc
Price each
$34.79
(VAT tax not included)
Minimum: 1
Multiple: 1
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Out of stock
  Microwave foam absorber sheet
Microwave foam absorber sheet
Order code: MAF-10A-30X60
Microwave foam absorber sheet

Conditions: N (The product is brand new)
Reflection loss: > 10 dB @ > 5 GHz, > 18 dB @ > 7 GHz
Minimum working frequency: 3.5 GHz
Temperature range (°C): -56 / +130
Electric resistance: ~MΩ
Absorbing material: soft and flexible foam loaded with coal
Thickness: 10.0 mm (0.394 in)
Sheet size (metric): 30.4 x 60.8 cm
Sheet size (inch): 12 x 24 in
With adhesive film: Yes
Go to product page
MAF-10A-30X60
Order code: MAF-10A-30X60
 
Stock: 0 pcs
Price each
$107.64
(VAT tax not included)
Minimum: 1
Multiple: 1
Compare
finishing
  Microwave foam absorber sheet
Microwave foam absorber sheet
Order code: MAF-10A-60X60
Microwave foam absorber sheet

Conditions: N (The product is brand new)
Reflection loss: > 10 dB @ > 5 GHz, > 18 dB @ > 7 GHz
Minimum working frequency: 3.5 GHz
Temperature range (°C): -56 / +130
Electric resistance: ~MΩ
Absorbing material: soft and flexible foam loaded with coal
Thickness: 10.0 mm (0.394 in)
Sheet size (metric): 60.8 x 60.8 cm
Sheet size (inch): 24 x 24 in
With adhesive film: Yes
Go to product page
MAF-10A-60X60
Order code: MAF-10A-60X60
 
Stock: 10 pcs
Price each
$212.02
Volume discounts
 3+
$195.71
(VAT tax not included)
Minimum: 1
Multiple: 1
Compare
  Microwave foam absorber sheet
Microwave foam absorber sheet
Order code: MAF-10A-6X20
Microwave foam absorber sheet

Conditions: N (The product is brand new)
Reflection loss: > 10 dB @ > 5 GHz, > 18 dB @ > 7 GHz
Minimum working frequency: 3.5 GHz
Temperature range (°C): -56 / +130
Electric resistance: ~MΩ
Absorbing material: soft and flexible foam loaded with coal
Thickness: 10.0 mm (0.394 in)
Sheet size (metric): 6 x 20 cm
Sheet size (inch): 2.4 x 8 in
With adhesive film: Yes
Go to product page
MAF-10A-6X20
Order code: MAF-10A-6X20
 
Stock: 22 pcs
Price each
$9.79
(VAT tax not included)
Minimum: 1
Multiple: 1
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ARC Technologies ML-10050 Microwave foam absorber sheet
Microwave foam absorber sheet
Order code: MAF-19-10X20
Microwave foam absorber sheet

ARC Technologies ML-10050
Conditions: N (The product is brand new)
Reflection loss: > 10 dB @ > 3 GHz, > 17 dB @ > 4 GHz
Minimum working frequency: 2 GHz
Temperature range (°C): -57 / +132
Electric resistance: ~KΩ dark side / ~MΩ bright side
Absorbing material: soft foam loaded with coal
Thickness: 19.1 mm (0.75 in)
Sheet size (metric): 10 x 20 cm
Sheet size (inch): 4 x 8 in
With adhesive film: No
Go to product page
MAF-19-10X20
Order code: MAF-19-10X20
ARC Technologies ML-10050 
Stock: 5 pcs
Price each
$20.44
(VAT tax not included)
Minimum: 1
Multiple: 1
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finishing
ARC Technologies ML-10050 Microwave foam absorber sheet
Microwave foam absorber sheet
Order code: MAF-19-20X20
Microwave foam absorber sheet

ARC Technologies ML-10050
Conditions: N (The product is brand new)
Reflection loss: > 10 dB @ > 3 GHz, > 17 dB @ > 4 GHz
Minimum working frequency: 2 GHz
Temperature range (°C): -57 / +132
Electric resistance: ~KΩ dark side / ~MΩ bright side
Absorbing material: soft foam loaded with coal
Thickness: 19.1 mm (0.75 in)
Sheet size (metric): 20 x 20 cm
Sheet size (inch): 8 x 8 in
With adhesive film: No
Go to product page
MAF-19-20X20
Order code: MAF-19-20X20
ARC Technologies ML-10050 
Stock: 2 pcs
Price each
$36.97
(VAT tax not included)
Minimum: 1
Multiple: 1
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finishing
ARC Technologies ML-10050 Microwave foam absorber sheet
Microwave foam absorber sheet
Order code: MAF-19-30X60
Microwave foam absorber sheet

ARC Technologies ML-10050
Conditions: N (The product is brand new)
Reflection loss: > 10 dB @ > 3 GHz, > 17 dB @ > 4 GHz
Minimum working frequency: 2 GHz
Temperature range (°C): -57 / +132
Electric resistance: ~KΩ dark side / ~MΩ bright side
Absorbing material: soft foam loaded with coal
Thickness: 19.1 mm (0.75 in)
Sheet size (metric): 30.4 x 60.8 cm
Sheet size (inch): 12 x 24 in
With adhesive film: No
Go to product page
MAF-19-30X60
Order code: MAF-19-30X60
ARC Technologies ML-10050 
Stock: 4 pcs
Price each
$118.52
(VAT tax not included)
Minimum: 1
Multiple: 1
Compare
ARC Technologies ML-10050 Microwave foam absorber sheet
Microwave foam absorber sheet
Order code: MAF-19-60X60
Microwave foam absorber sheet

ARC Technologies ML-10050
Conditions: N (The product is brand new)
Reflection loss: > 10 dB @ > 3 GHz, > 17 dB @ > 4 GHz
Minimum working frequency: 2 GHz
Temperature range (°C): -57 / +132
Electric resistance: ~KΩ dark side / ~MΩ bright side
Absorbing material: soft foam loaded with coal
Thickness: 19.1 mm (0.75 in)
Sheet size (metric): 60.8 x 60.8 cm
Sheet size (inch): 24 x 24 in
With adhesive film: No
Go to product page
MAF-19-60X60
Order code: MAF-19-60X60
ARC Technologies ML-10050 
Stock: 21 pcs
Price each
$216.37
Volume discounts
 3+
$205.50
(VAT tax not included)
Minimum: 1
Multiple: 1
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Out of stock
  Microwave foam absorber sheet
Microwave foam absorber sheet
Order code: MAF-3A-10X20
Microwave foam absorber sheet

Conditions: N (The product is brand new)
Reflection loss: > 6 dB @ > 8 GHz
Minimum working frequency: 5 GHz
Temperature range (°C): -50 / +120
Electric resistance: ~KΩ
Absorbing material: soft and flexible foam loaded with coal
Thickness: 3.10 mm (0.122 in)
Sheet size (metric): 10 x 20 cm
Sheet size (inch): 4 x 8 in
With adhesive film: Yes
Go to product page
MAF-3A-10X20
Order code: MAF-3A-10X20
 
Stock: 0 pcs
Price each
$9.24
(VAT tax not included)
Minimum: 1
Multiple: 1
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Out of stock
  Microwave foam absorber sheet
Microwave foam absorber sheet
Order code: MAF-3A-20X20
Microwave foam absorber sheet

Conditions: N (The product is brand new)
Reflection loss: > 6 dB @ > 8 GHz
Minimum working frequency: 5 GHz
Temperature range (°C): -50 / +120
Electric resistance: ~KΩ
Absorbing material: soft and flexible foam loaded with coal
Thickness: 3.10 mm (0.122 in)
Sheet size (metric): 20 x 20 cm
Sheet size (inch): 8 x 8 in
With adhesive film: Yes
Go to product page
MAF-3A-20X20
Order code: MAF-3A-20X20
 
Stock: 0 pcs
Price each
$17.40
(VAT tax not included)
Minimum: 1
Multiple: 1
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Out of stock
  Microwave foam absorber sheet
Microwave foam absorber sheet
Order code: MAF-3A-30X60
Microwave foam absorber sheet

Conditions: N (The product is brand new)
Reflection loss: > 6 dB @ > 8 GHz
Minimum working frequency: 5 GHz
Temperature range (°C): -50 / +120
Electric resistance: ~KΩ
Absorbing material: soft and flexible foam loaded with coal
Thickness: 3.10 mm (0.122 in)
Sheet size (metric): 30.4 x 60.8 cm
Sheet size (inch): 12 x 24 in
With adhesive film: Yes
Go to product page
MAF-3A-30X60
Order code: MAF-3A-30X60
 
Stock: 0 pcs
Price each
$59.80
(VAT tax not included)
Minimum: 1
Multiple: 1
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finishing
  Microwave foam absorber sheet
Microwave foam absorber sheet
Order code: MAF-3A-60X60
Microwave foam absorber sheet

Conditions: N (The product is brand new)
Reflection loss: > 6 dB @ > 8 GHz
Minimum working frequency: 5 GHz
Temperature range (°C): -50 / +120
Electric resistance: ~KΩ
Absorbing material: soft and flexible foam loaded with coal
Thickness: 3.10 mm (0.122 in)
Sheet size (metric): 60.8 x 60.8 cm
Sheet size (inch): 24 x 24 in
With adhesive film: Yes
Go to product page
MAF-3A-60X60
Order code: MAF-3A-60X60
 
Stock: 1 pc
Price each
$106.56
Volume discounts
 3+
$102.21
(VAT tax not included)
Minimum: 1
Multiple: 1
Compare
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Emerson & Cuming ECCOSORB LS-22
 
(0 comments)
Microwave foam absorber sheet
Order code: LS22-32X45
Emerson & Cuming ECCOSORB LS-22
  • N
  • 7.4 dB @ 3 GHz, 14.9 dB @ 10 GHz
  • 4 GHz
  • -70 / +93
  • ~KΩ
  • soft and flexible urethane foam loaded with coal
  • 6.35 mm (0.25 in)
  • 32 x 45 mm
  • 1.8 x 1.3 in
  • No
Stock: 584 pcs
Minimum: 1 pc
Multiple: 1 pc
 1+
$1.03
 10+
$0.92
 30+
$0.87
 100+
$0.82
 250+
$0.76
(VAT tax not included)
 

Compare
Emerson & Cuming ECCOSORB LS-22
 
(0 comments)
Microwave foam absorber sheet
Order code: LS22-35X35
Emerson & Cuming ECCOSORB LS-22
  • N
  • 7.4 dB @ 3 GHz, 14.9 dB @ 10 GHz
  • 4 GHz
  • -70 / +93
  • ~KΩ
  • soft and flexible urethane foam loaded with coal
  • 6.35 mm (0.25 in)
  • 35 x 35 mm
  • 1.4 x 1.4 in
  • No
Stock: 478 pcs
Minimum: 1 pc
Multiple: 1 pc
 1+
$1.03
 10+
$0.92
 30+
$0.87
 100+
$0.82
 250+
$0.76
(VAT tax not included)
 

Compare
Out of stock
 
(0 comments)
Microwave foam absorber sheet
Order code: MAF-10A-10X20
  • N
  • > 10 dB @ > 5 GHz, > 18 dB @ > 7 GHz
  • 3.5 GHz
  • -56 / +130
  • ~MΩ
  • soft and flexible foam loaded with coal
  • 10.0 mm (0.394 in)
  • 10 x 20 cm
  • 4 x 8 in
  • Yes
Stock: 0 pcs
Minimum: 1 pc
Multiple: 1 pc
 1+
$19.03
(VAT tax not included)
 

Compare
finishing
 
(0 comments)
Microwave foam absorber sheet
Order code: MAF-10A-20X20
  • N
  • > 10 dB @ > 5 GHz, > 18 dB @ > 7 GHz
  • 3.5 GHz
  • -56 / +130
  • ~MΩ
  • soft and flexible foam loaded with coal
  • 10.0 mm (0.394 in)
  • 20 x 20 cm
  • 8 x 8 in
  • Yes
Stock: 1 pc
Minimum: 1 pc
Multiple: 1 pc
 1+
$34.79
(VAT tax not included)
 

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Out of stock
 
(0 comments)
Microwave foam absorber sheet
Order code: MAF-10A-30X60
  • N
  • > 10 dB @ > 5 GHz, > 18 dB @ > 7 GHz
  • 3.5 GHz
  • -56 / +130
  • ~MΩ
  • soft and flexible foam loaded with coal
  • 10.0 mm (0.394 in)
  • 30.4 x 60.8 cm
  • 12 x 24 in
  • Yes
Stock: 0 pcs
Minimum: 1 pc
Multiple: 1 pc
 1+
$107.64
(VAT tax not included)
 

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finishing
 
(0 comments)
Microwave foam absorber sheet
Order code: MAF-10A-60X60
  • N
  • > 10 dB @ > 5 GHz, > 18 dB @ > 7 GHz
  • 3.5 GHz
  • -56 / +130
  • ~MΩ
  • soft and flexible foam loaded with coal
  • 10.0 mm (0.394 in)
  • 60.8 x 60.8 cm
  • 24 x 24 in
  • Yes
Stock: 10 pcs
Minimum: 1 pc
Multiple: 1 pc
 1+
$212.02
 3+
$195.71
(VAT tax not included)
 

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(0 comments)
Microwave foam absorber sheet
Order code: MAF-10A-6X20
  • N
  • > 10 dB @ > 5 GHz, > 18 dB @ > 7 GHz
  • 3.5 GHz
  • -56 / +130
  • ~MΩ
  • soft and flexible foam loaded with coal
  • 10.0 mm (0.394 in)
  • 6 x 20 cm
  • 2.4 x 8 in
  • Yes
Stock: 22 pcs
Minimum: 1 pc
Multiple: 1 pc
 1+
$9.79
(VAT tax not included)
 

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finishing
ARC Technologies ML-10050
 
(0 comments)
Microwave foam absorber sheet
Order code: MAF-19-10X20
ARC Technologies ML-10050
  • N
  • > 10 dB @ > 3 GHz, > 17 dB @ > 4 GHz
  • 2 GHz
  • -57 / +132
  • ~KΩ dark side / ~MΩ bright side
  • soft foam loaded with coal
  • 19.1 mm (0.75 in)
  • 10 x 20 cm
  • 4 x 8 in
  • No
Stock: 5 pcs
Minimum: 1 pc
Multiple: 1 pc
 1+
$20.44
(VAT tax not included)
 

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finishing
ARC Technologies ML-10050
 
(0 comments)
Microwave foam absorber sheet
Order code: MAF-19-20X20
ARC Technologies ML-10050
  • N
  • > 10 dB @ > 3 GHz, > 17 dB @ > 4 GHz
  • 2 GHz
  • -57 / +132
  • ~KΩ dark side / ~MΩ bright side
  • soft foam loaded with coal
  • 19.1 mm (0.75 in)
  • 20 x 20 cm
  • 8 x 8 in
  • No
Stock: 2 pcs
Minimum: 1 pc
Multiple: 1 pc
 1+
$36.97
(VAT tax not included)
 

Compare
finishing
ARC Technologies ML-10050
 
(0 comments)
Microwave foam absorber sheet
Order code: MAF-19-30X60
ARC Technologies ML-10050
  • N
  • > 10 dB @ > 3 GHz, > 17 dB @ > 4 GHz
  • 2 GHz
  • -57 / +132
  • ~KΩ dark side / ~MΩ bright side
  • soft foam loaded with coal
  • 19.1 mm (0.75 in)
  • 30.4 x 60.8 cm
  • 12 x 24 in
  • No
Stock: 4 pcs
Minimum: 1 pc
Multiple: 1 pc
 1+
$118.52
(VAT tax not included)
 

Compare
ARC Technologies ML-10050
 
(0 comments)
Microwave foam absorber sheet
Order code: MAF-19-60X60
ARC Technologies ML-10050
  • N
  • > 10 dB @ > 3 GHz, > 17 dB @ > 4 GHz
  • 2 GHz
  • -57 / +132
  • ~KΩ dark side / ~MΩ bright side
  • soft foam loaded with coal
  • 19.1 mm (0.75 in)
  • 60.8 x 60.8 cm
  • 24 x 24 in
  • No
Stock: 21 pcs
Minimum: 1 pc
Multiple: 1 pc
 1+
$216.37
 3+
$205.50
(VAT tax not included)
 

Compare
Out of stock
 
(0 comments)
Microwave foam absorber sheet
Order code: MAF-3A-10X20
  • N
  • > 6 dB @ > 8 GHz
  • 5 GHz
  • -50 / +120
  • ~KΩ
  • soft and flexible foam loaded with coal
  • 3.10 mm (0.122 in)
  • 10 x 20 cm
  • 4 x 8 in
  • Yes
Stock: 0 pcs
Minimum: 1 pc
Multiple: 1 pc
 1+
$9.24
(VAT tax not included)
 

Compare
Out of stock
 
(0 comments)
Microwave foam absorber sheet
Order code: MAF-3A-20X20
  • N
  • > 6 dB @ > 8 GHz
  • 5 GHz
  • -50 / +120
  • ~KΩ
  • soft and flexible foam loaded with coal
  • 3.10 mm (0.122 in)
  • 20 x 20 cm
  • 8 x 8 in
  • Yes
Stock: 0 pcs
Minimum: 1 pc
Multiple: 1 pc
 1+
$17.40
(VAT tax not included)
 

Compare
Out of stock
 
(0 comments)
Microwave foam absorber sheet
Order code: MAF-3A-30X60
  • N
  • > 6 dB @ > 8 GHz
  • 5 GHz
  • -50 / +120
  • ~KΩ
  • soft and flexible foam loaded with coal
  • 3.10 mm (0.122 in)
  • 30.4 x 60.8 cm
  • 12 x 24 in
  • Yes
Stock: 0 pcs
Minimum: 1 pc
Multiple: 1 pc
 1+
$59.80
(VAT tax not included)
 

Compare
finishing
 
(0 comments)
Microwave foam absorber sheet
Order code: MAF-3A-60X60
  • N
  • > 6 dB @ > 8 GHz
  • 5 GHz
  • -50 / +120
  • ~KΩ
  • soft and flexible foam loaded with coal
  • 3.10 mm (0.122 in)
  • 60.8 x 60.8 cm
  • 24 x 24 in
  • Yes
Stock: 1 pc
Minimum: 1 pc
Multiple: 1 pc
 1+
$106.56
 3+
$102.21
(VAT tax not included)
 

Compare
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