The WRCD10-1727.5-1730-1735-1737.5-40-2 from Wainwright Instruments is a Band Stop Filter with Stopband Frequency 1.73 to 1.735 GHz, Bandwidth 5 MHz, Insertion Loss 1.25 to 2 dB, Rejection 40 dB, VSWR 1.50:1. Tags: Module with Connectors, Cavity Filter. More details for WRCD10-1727.5-1730-1735-1737.5-40-2 can be seen below.