The WLK7-1000-2000-60-9000-20 from Wainwright Instruments is a Low Pass RF Filter with Frequency DC to 1 / 2 GHz, Stopband Frequency Chosen Fco x 1.3 to 9 GHz, 3 dB Cutoff Frequency Choice of 1 to 2 GHz, Insertion Loss 0.5 to 0.7 dB, Rejection 60 dB. Tags: Module with Connector, Lumped Component Filter, Chebyshev Filter. More details for WLK7-1000-2000-60-9000-20 can be seen below.