The RMFI.512Nfm from Response Microwave Inc is a Low Pass RF Filter with Frequency 380 to 512 MHz, Stopband Frequency 768 to 2560 MHz, Insertion Loss 0.8 dB, Rejection 60 dB, Power 50 W. Tags: Module with Connector, Chebyshev Filter. More details for RMFI.512Nfm can be seen below.