The LC9S-4000M-50-2A from TTE Filters is a Low Pass RF Filter with Frequency DC to 4 GHz, Stopband Frequency 6 to 8 GHz, Insertion Loss 1 dB, Rejection -40 to -60 dBc, Power 10 W. Tags: Module with Connector, Chebyshev Filter. More details for LC9S-4000M-50-2A can be seen below.