The WLJ10-3300-3400-40-12000-300 from Wainwright Instruments is a Low Pass RF Filter with Frequency DC to 3.3 / 3.4 GHz, Stopband Frequency Chosen Fco x 1.16 to 12 GHz, 3 dB Cutoff Frequency Choice of 3.3 to 3.4 GHz, Insertion Loss 0.4 to 0.6 dB, Rejection 40 dB. Tags: Module with Connector, Lumped Component Filter, Chebyshev Filter. More details for WLJ10-3300-3400-40-12000-300 can be seen below.