The WRCTF12+9-811.5-816.5-856.5-861.5-50 from Wainwright Instruments is a Band Stop Filter with Stopband Frequency 816.5 to 856.5 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+9-811.5-816.5-856.5-861.5-50 can be seen below.