The WLKX10-1000-2000-40-18000-20 from Wainwright Instruments is a Low Pass RF Filter with Frequency DC to 1 / 2 GHz, Stopband Frequency Chosen Fco x 1.1 to 18 GHz, 3 dB Cutoff Frequency Choice of 1 to 2 GHz, Insertion Loss 1 to 1.5 dB, Rejection 40 dB. Tags: Module with Connector, Lumped Component Filter, Chebyshev Filter. More details for WLKX10-1000-2000-40-18000-20 can be seen below.