The MT100-80 from Withwave is a Microwave Absorber with Frequency DC to 18 GHz, Thickness 0.03 Inch/0.8 mm, Thickness 0.03 Inch, Thickness (mm) 0.8 mm, Resistance 1 x 10^6 Ohms. Tags: Cavity Resonance Absorber. More details for MT100-80 can be seen below.