The 3660-T-500 from Holland Shielding Systems is a Microwave Absorber with Absorption 13 to 28 dB, Frequency 30 MHz to 18 GHz, Power 1.5 kW, Thickness 4.33 inch/110 mm, Thickness 4.33 inch. Tags: Pyramid, Foam Absorber, Hybrid Absorber, EMC Absorber. More details for 3660-T-500 can be seen below.