The WLJ5-6000-7500-40-16000-300 from Wainwright Instruments is a Low Pass RF Filter with Frequency DC to 6 / 7.5 GHz, Stopband Frequency Chosen Fco x 1.53 to 16 GHz, 3 dB Cutoff Frequency Choice of 6 to 7.5 GHz, Insertion Loss 0.25 to 0.3 dB, Rejection 40 dB. Tags: Module with Connector, Lumped Component Filter, Chebyshev Filter. More details for WLJ5-6000-7500-40-16000-300 can be seen below.