The RMFI.870Nfm from Response Microwave Inc is a Low Pass RF Filter with Frequency 762 to 870 MHz, Stopband Frequency 1305 to 4350 MHz, Insertion Loss 0.8 dB, Rejection 60 dB, Power 50 W. Tags: Module with Connector, Chebyshev Filter. More details for RMFI.870Nfm can be seen below.