The WRCTF12+9-2555-2558-2628-2631-40 from Wainwright Instruments is a Band Stop Filter with Stopband Frequency 2.558 to 2.628 GHz, Bandwidth 70 MHz, Insertion Loss 2 to 4.5 dB, Rejection 40 dB, VSWR 1.50:1. Tags: Module with Connectors, Cavity Filter. More details for WRCTF12+9-2555-2558-2628-2631-40 can be seen below.