The WRCGV8-1770-1780-1810-1820-40 from Wainwright Instruments is a Band Stop Filter with Stopband Frequency 1.78 to 1.81 GHz, Bandwidth 30 MHz, Insertion Loss 0.75 to 1.5 dB, Rejection 40 dB, VSWR 1.50:1. Tags: Module with Connectors, Cavity Filter. More details for WRCGV8-1770-1780-1810-1820-40 can be seen below.