The WLJ5-8000-8500-40-17000-300 from Wainwright Instruments is a Low Pass RF Filter with Frequency DC to 8 / 8.5 GHz, Stopband Frequency Chosen Fco x 1.53 to 17 GHz, 3 dB Cutoff Frequency Choice of 8 to 8.5 GHz, Insertion Loss 0.25 to 0.3 dB, Rejection 40 dB. Tags: Module with Connector, Lumped Component Filter, Chebyshev Filter. More details for WLJ5-8000-8500-40-17000-300 can be seen below.