The WLJ5-35-50-60-3000-100 from Wainwright Instruments is a Low Pass RF Filter with Frequency DC to 35 / 50 MHz, Stopband Frequency Chosen Fco x 1.57 to 3 GHz, 3 dB Cutoff Frequency Choice of 35 to 50 MHz, Insertion Loss 0.55 to 0.7 dB, Rejection 60 dB. Tags: Module with Connector, Lumped Component Filter, Chebyshev Filter. More details for WLJ5-35-50-60-3000-100 can be seen below.