The 11383 3625-4200 from Microwave Filter Company is a Waveguide Filter with Frequency 3.665 to 4.165 GHz, Insertion Loss 1 dB, Rejection 20 to 80 dB, Rejection Frequency 3.465 to 4.365 GHz. Tags: Band Pass. More details for 11383 3625-4200 can be seen below.