The WLJ3-35-50-40-3000-100 from Wainwright Instruments is a Low Pass RF Filter with Frequency DC to 35 / 50 MHz, Stopband Frequency Chosen Fco x 2 to 3 GHz, 3 dB Cutoff Frequency Choice of 35 to 50 MHz, Insertion Loss 0.4 to 0.45 dB, Rejection 40 dB. Tags: Module with Connector, Lumped Component Filter, Chebyshev Filter. More details for WLJ3-35-50-40-3000-100 can be seen below.