The WBCTB3-2122.5-2152.5-2157.5-2187.5-40-1 from Wainwright Instruments is a Band Pass Filter with Frequency 2.1525 to 2.1575 GHz, Bandwidth 5 MHz, Center Frequency 2.155 GHz, Insertion Loss 1.25 to 1.75 dB, Rejection 40 dB. Tags: Module with Connectors, Cavity Filter. More details for WBCTB3-2122.5-2152.5-2157.5-2187.5-40-1 can be seen below.