The WLJ3-2250-2950-60-8000-50 from Wainwright Instruments is a Low Pass RF Filter with Frequency DC to 2.25 / 2.95 GHz, Stopband Frequency Chosen Fco x 2.7 to 8 GHz, 3 dB Cutoff Frequency Choice of 2.25 to 2.95 GHz, Insertion Loss 0.2 to 0.25 dB, Rejection 60 dB. Tags: Module with Connector, Lumped Component Filter, Chebyshev Filter. More details for WLJ3-2250-2950-60-8000-50 can be seen below.