The WRCTF12+9-812.5-817.5-857.5-862.5-50 from Wainwright Instruments is a Band Stop Filter with Stopband Frequency 817.5 to 857.5 MHz, Bandwidth 40 MHz, Insertion Loss 1.5 to 2 dB, Rejection 50 dB, VSWR 1.50:1. Tags: Module with Connectors, Cavity Filter. More details for WRCTF12+9-812.5-817.5-857.5-862.5-50 can be seen below.