The WBCTB3-2107.5-2137.5-2142.5-2172.5-40-4 from Wainwright Instruments is a Band Pass Filter with Frequency 2.1375 to 2.1425 GHz, Bandwidth 5 MHz, Center Frequency 2.14 GHz, Insertion Loss 1.25 to 1.75 dB, Rejection 40 dB. Tags: Module with Connectors, Cavity Filter. More details for WBCTB3-2107.5-2137.5-2142.5-2172.5-40-4 can be seen below.