The WBCTB8-2122.5-2127.5-2137.5-2142.5-40-2 from Wainwright Instruments is a Band Pass Filter with Frequency 2.1275 to 2.1375 GHz, Bandwidth 10 MHz, Center Frequency 2.1325 GHz, Insertion Loss 2.25 to 3.25 dB, Rejection 40 dB. Tags: Module with Connectors, Cavity Filter. More details for WBCTB8-2122.5-2127.5-2137.5-2142.5-40-2 can be seen below.