The WRCJV8-5260-5290-5310-5340-50 from Wainwright Instruments is a Band Stop Filter with Stopband Frequency 5.29 to 5.31 GHz, Bandwidth 20 MHz, Insertion Loss 1.5 to 2.25 dB, Rejection 50 dB, VSWR 1.67:1. Tags: Module with Connectors, Cavity Filter. More details for WRCJV8-5260-5290-5310-5340-50 can be seen below.