The 3650-100-CF from Holland Shielding Systems is a Microwave Absorber with Absorption 15 to 22 dB, Frequency 1 to 18 GHz, Thickness 3.93 Inch/100 mm, Thickness 3.93 Inch, Thickness (mm) 100 mm. Tags: Foam Absorber. More details for 3650-100-CF can be seen below.