The WLJ5-2200-2500-60-8000-300 from Wainwright Instruments is a Low Pass RF Filter with Frequency DC to 2.2 / 2.5 GHz, Stopband Frequency Chosen Fco x 1.95 to 8 GHz, 3 dB Cutoff Frequency Choice of 2.2 to 2.5 GHz, Insertion Loss 0.25 to 0.3 dB, Rejection 60 dB. Tags: Module with Connector, Lumped Component Filter, Chebyshev Filter. More details for WLJ5-2200-2500-60-8000-300 can be seen below.