The WLJ10-50-60-40-3000-100 from Wainwright Instruments is a Low Pass RF Filter with Frequency DC to 50 / 60 MHz, Stopband Frequency Chosen Fco x 1.1 to 3 GHz, 3 dB Cutoff Frequency Choice of 50 to 60 MHz, Insertion Loss 1.2 to 1.7 dB, Rejection 40 dB. Tags: Module with Connector, Lumped Component Filter, Chebyshev Filter. More details for WLJ10-50-60-40-3000-100 can be seen below.