The HS100-120 from Withwave is a Microwave Absorber with Frequency DC to 20 GHz, Thickness 0.05 Inch/1.2 mm, Thickness 0.05 Inch, Thickness (mm) 1.2 mm, Resistance 1 x 10^6 Ohms. Tags: Cavity Resonance Absorber. More details for HS100-120 can be seen below.