The RSF-173.075-80-5070-TR from Raltron is a Band Pass Filter with Frequency 173.0025 to 173.1475 MHz, Bandwidth 0.145 MHz, Center Frequency 173.075 MHz, Insertion Loss 2.8 to 4 dB, Rejection 28 to 50 dB. Tags: Surface Mount, RF SAW Filter. More details for RSF-173.075-80-5070-TR can be seen below.