The 3680-500 from Holland Shielding Systems is a Microwave Absorber with Absorption 20 to 50 dB, Frequency 30 MHz to 100 GHz, Power 4 kW, Thickness 19.68 Inch/500 mm, Thickness 19.68 Inch. Tags: Pyramid, Power Absorber. More details for 3680-500 can be seen below.