The WLKX10-15000-16000-40-21000-20 from Wainwright Instruments is a Low Pass RF Filter with Frequency DC to 15 / 16 GHz, Stopband Frequency Chosen Fco x 1.16 to 21 GHz, 3 dB Cutoff Frequency Choice of 15 to 16 GHz, Insertion Loss 1 to 1.3 dB, Rejection 40 dB. Tags: Module with Connector, Lumped Component Filter, Chebyshev Filter. More details for WLKX10-15000-16000-40-21000-20 can be seen below.