The WLK6-185-215-60-6000-20 from Wainwright Instruments is a Low Pass RF Filter with Frequency DC to 185 / 215 MHz, Stopband Frequency Chosen Fco x 1.4 to 6 GHz, 3 dB Cutoff Frequency Choice of 185 to 215 MHz, Insertion Loss 0.55 to 0.8 dB, Rejection 60 dB. Tags: Module with Connector, Lumped Component Filter, Chebyshev Filter. More details for WLK6-185-215-60-6000-20 can be seen below.