The WLK10-70-75-40-6000-20 from Wainwright Instruments is a Low Pass RF Filter with Frequency DC to 70 / 75 MHz, Stopband Frequency Chosen Fco x 1.1 to 6 GHz, 3 dB Cutoff Frequency Choice of 70 to 75 MHz, Insertion Loss 1.25 to 2 dB, Rejection 40 dB. Tags: Module with Connector, Lumped Component Filter, Chebyshev Filter. More details for WLK10-70-75-40-6000-20 can be seen below.