The WLJ5-8500-9000-60-17000-300 from Wainwright Instruments is a Low Pass RF Filter with Frequency DC to 8.5 / 9 GHz, Stopband Frequency Chosen Fco x 1.95 to 17 GHz, 3 dB Cutoff Frequency Choice of 8.5 to 9 GHz, Insertion Loss 0.25 to 0.3 dB, Rejection 60 dB. Tags: Module with Connector, Lumped Component Filter, Chebyshev Filter. More details for WLJ5-8500-9000-60-17000-300 can be seen below.