The WRCD20-1720.5-1722.5-1742.5-1744.5-40-1 from Wainwright Instruments is a Band Stop Filter with Stopband Frequency 1.7225 to 1.7425 GHz, Bandwidth 20 MHz, Insertion Loss 2 to 3.5 dB, Rejection 40 dB, VSWR 1.50:1. Tags: Module with Connectors, Cavity Filter. More details for WRCD20-1720.5-1722.5-1742.5-1744.5-40-1 can be seen below.