The WRCGV8-913-915-921-923-30 from Wainwright Instruments is a Band Stop Filter with Stopband Frequency 915 to 921 MHz, Bandwidth 6 MHz, Insertion Loss 0.75 to 3 dB, Rejection 30 dB, VSWR 1.50:1. Tags: Module with Connectors, Cavity Filter. More details for WRCGV8-913-915-921-923-30 can be seen below.