The HT300-30 from Withwave is a Microwave Absorber with Frequency DC to 36 GHz, Thickness 0.01 Inch/0.3 mm, Thickness 0.01 Inch, Thickness (mm) 0.3 mm, Resistance 1 x 10^6 Ohms. Tags: Cavity Resonance Absorber. More details for HT300-30 can be seen below.