The WBCTB8-2525-2530-2540-2545-40-2 from Wainwright Instruments is a Band Pass Filter with Frequency 2.53 to 2.54 GHz, Bandwidth 10 MHz, Center Frequency 2.535 GHz, Insertion Loss 2.25 to 3.25 dB, Rejection 40 dB. Tags: Module with Connectors, Cavity Filter. More details for WBCTB8-2525-2530-2540-2545-40-2 can be seen below.