The WRCTF12+9-838-840-850-852-80 from Wainwright Instruments is a Band Stop Filter with Stopband Frequency 840 to 850 MHz, Bandwidth 10 MHz, Insertion Loss 1.5 to 3 dB, Rejection 80 dB, VSWR 1.50:1. Tags: Module with Connectors, Cavity Filter. More details for WRCTF12+9-838-840-850-852-80 can be seen below.