The AEPV-4 from Microwave Vision Group is a Microwave Absorber with Absorption 30 to 50 dB, Frequency 125 MHz to 40 GHz, Power 2 W, Thickness 4 Inch/101.6 mm, Thickness 4 Inch. Tags: Pyramid, Wedge Absorber, Ventilated Absorber. More details for AEPV-4 can be seen below.