The WLK10-130-185-60-6000-20 from Wainwright Instruments is a Low Pass RF Filter with Frequency DC to 130 / 185 MHz, Stopband Frequency Chosen Fco x 1.155 to 6 GHz, 3 dB Cutoff Frequency Choice of 130 to 185 MHz, Insertion Loss 1.05 to 1.75 dB, Rejection 60 dB. Tags: Module with Connector, Lumped Component Filter, Chebyshev Filter. More details for WLK10-130-185-60-6000-20 can be seen below.