Note : Your request will be directed to Euro Technologies.
The MWA4-U-500-1 from Euro Technologies is a Microwave Absorber with Frequency 3 GHz, Insertion Loss -25 dB, Thickness 0.508 mm, 12.7 mm, Thickness (Inch) 0.508 mm, Thickness (mm) 12.7 mm. More details for MWA4-U-500-1 can be seen below.
500 MHz to 40 GHz Polystyrene Microwave Absorber
You can now find similar products from multiple companies on everything RF.