The RSF-737.500-17000-1109-TR-NS1 from Raltron is a Band Pass Filter with Frequency 652.5 to 822.5 MHz, Bandwidth 170 MHz, Center Frequency 737.5 MHz, Insertion Loss 2 to 2.5 dB, Rejection 58 to 5 dB. Tags: Surface Mount, RF SAW Filter. More details for RSF-737.500-17000-1109-TR-NS1 can be seen below.