The WRCD5-1958.5-1961-1964-1966.5-30 from Wainwright Instruments is a Band Stop Filter with Stopband Frequency 1.961 to 1.964 GHz, Bandwidth 3 MHz, Insertion Loss 0.75 to 1.5 dB, Rejection 30 dB, VSWR 1.50:1. Tags: Module with Connectors, Cavity Filter. More details for WRCD5-1958.5-1961-1964-1966.5-30 can be seen below.