The WRCTF12+9-2548-2558-2628-2638-75 from Wainwright Instruments is a Band Stop Filter with Stopband Frequency 2.558 to 2.628 GHz, Bandwidth 70 MHz, Insertion Loss 2 to 3 dB, Rejection 75 dB, VSWR 1.50:1. Tags: Module with Connectors, Cavity Filter. More details for WRCTF12+9-2548-2558-2628-2638-75 can be seen below.