The WRCT8-739-743-753-757-40 from Wainwright Instruments is a Band Stop Filter with Stopband Frequency 743 to 753 MHz, Bandwidth 10 MHz, Insertion Loss 0.6 to 1 dB, Rejection 40 dB, VSWR 1.43:1. Tags: Module with Connectors, Cavity Filter. More details for WRCT8-739-743-753-757-40 can be seen below.