The 3620-270 from Holland Shielding Systems is a Microwave Absorber with Absorption -25 to -15 dB, Frequency 30 MHz to 2 GHz, Thickness 1.06 Inch/27 mm, Thickness 1.06 Inch, Thickness (mm) 27 mm. Tags: Ferrite, EMC Absorber. More details for 3620-270 can be seen below.