The LC9S-30M-50-1765A from TTE Filters is a Low Pass RF Filter with Frequency DC to 30 MHz, Stopband Frequency 45 to 60 MHz, Insertion Loss 1 dB, Rejection -40 to -60 dBc, Power 5 W. Tags: Module with Connector, Chebyshev Filter. More details for LC9S-30M-50-1765A can be seen below.