The GT 602 from Getelec is a Microwave Absorber with Absorption >20 dB, Frequency 1 to 40 GHz, Attenuation -40 to -5 dB, Thickness 0.03 to 0.17 Inches / 0.95 to 4.5 mm, Thickness 0.03 to 0.17 Inches. Tags: Foam Absorber. More details for GT 602 can be seen below.