The AEP-4-WP from Microwave Vision Group is a Microwave Absorber with Absorption 20 to 40 dB, Frequency 125 MHz to 18 GHz, Power 0.5 W, Thickness 4 Inch/101.6 mm, Thickness 4 Inch. Tags: Weatherproof Absorber. More details for AEP-4-WP can be seen below.