The WLK10-75-130-60-6000-20 from Wainwright Instruments is a Low Pass RF Filter with Frequency DC to 75 / 130 MHz, Stopband Frequency Chosen Fco x 1.155 to 6 GHz, 3 dB Cutoff Frequency Choice of 75 to 130 MHz, Insertion Loss 1.15 to 1.9 dB, Rejection 60 dB. Tags: Module with Connector, Lumped Component Filter, Chebyshev Filter. More details for WLK10-75-130-60-6000-20 can be seen below.