The WLKE4-0.075-0.1-40-8000-0.01 from Wainwright Instruments is a Low Pass RF Filter with Frequency DC to 0.075 / 0.1 MHz, Stopband Frequency Chosen Fco x 1.08 to 8 GHz, 3 dB Cutoff Frequency Choice of 0.075 to 0.1 MHz, Insertion Loss 0.8 to 1.9 dB, Rejection 40 dB. Tags: Module with Connector, Lumped Component Filter, Chebyshev Filter. More details for WLKE4-0.075-0.1-40-8000-0.01 can be seen below.