The AEPHT-18 from Microwave Vision Group is a Microwave Absorber with Absorption 15 to 40 dB, Frequency 20 MHz to 40 GHz, Thickness 18 Inch/457.2 mm, Thickness 18 Inch, Thickness (mm) 457.2 mm. Tags: Pyramid, EMC Absorber. More details for AEPHT-18 can be seen below.