The MT20-200 from Withwave is a Microwave Absorber with Frequency DC to 18 GHz, Thickness 0.08 Inch/2 mm, Thickness 0.08 Inch, Thickness (mm) 2 mm, Resistance 1 x 10^6 Ohms. Tags: Cavity Resonance Absorber. More details for MT20-200 can be seen below.