The WRCD10-1809.9-1812.4-1817.4-1819.9-40 from Wainwright Instruments is a Band Stop Filter with Stopband Frequency 1.8124 to 1.8174 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 WRCD10-1809.9-1812.4-1817.4-1819.9-40 can be seen below.