The 3680-1200 from Holland Shielding Systems is a Microwave Absorber with Absorption 5 to 50 dB, Frequency 30 MHz to 100 GHz, Power 6 kW, Thickness 47.24 Inch/1200 mm, Thickness 47.24 Inch. Tags: Pyramid, Power Absorber, Hollow Absorber. More details for 3680-1200 can be seen below.