The 3610-600-40 from Holland Shielding Systems is a Microwave Absorber with Absorption up to -37 dB, Frequency 30 MHz to 1 GHz, Thickness 1.57 Inch/40 mm, Thickness 1.57 Inch, Thickness (mm) 40 mm. Tags: Ferrite. More details for 3610-600-40 can be seen below.