The WRCT40-1756.5-1757.5-1777.5-1778.5-50 from Wainwright Instruments is a Band Stop Filter with Stopband Frequency 1.7575 to 1.7775 GHz, Bandwidth 20 MHz, Insertion Loss 3.5 to 6.5 dB, Rejection 50 dB, VSWR 1.50:1. Tags: Module with Connectors, Cavity Filter. More details for WRCT40-1756.5-1757.5-1777.5-1778.5-50 can be seen below.