The WLJ10-2000-2200-40-6000-300 from Wainwright Instruments is a Low Pass RF Filter with Frequency DC to 2 / 2.2 GHz, Stopband Frequency Chosen Fco x 1.16 to 6 GHz, 3 dB Cutoff Frequency Choice of 2 to 2.2 GHz, Insertion Loss 0.4 to 0.6 dB, Rejection 40 dB. Tags: Module with Connector, Lumped Component Filter, Chebyshev Filter. More details for WLJ10-2000-2200-40-6000-300 can be seen below.