The WBCTB8-2583-2588-2598-2603-40-1 from Wainwright Instruments is a Band Pass Filter with Frequency 2.588 to 2.598 GHz, Bandwidth 10 MHz, Center Frequency 2.593 GHz, Insertion Loss 2.25 to 3.25 dB, Rejection 40 dB. Tags: Module with Connectors, Cavity Filter. More details for WBCTB8-2583-2588-2598-2603-40-1 can be seen below.