The WRCT16-737-738-743-744-40 from Wainwright Instruments is a Band Stop Filter with Stopband Frequency 738 to 743 MHz, Bandwidth 5 MHz, Insertion Loss 1 to 2.5 dB, Rejection 40 dB, VSWR 1.50:1. Tags: Module with Connectors, Cavity Filter. More details for WRCT16-737-738-743-744-40 can be seen below.