The WRCD20-1741.5-1742.5-1747.5-1748.5-40-3 from Wainwright Instruments is a Band Stop Filter with Stopband Frequency 1.7425 to 1.7475 GHz, Bandwidth 5 MHz, Insertion Loss 2 to 4 dB, Rejection 40 dB, VSWR 1.50:1. Tags: Module with Connectors, Cavity Filter. More details for WRCD20-1741.5-1742.5-1747.5-1748.5-40-3 can be seen below.