The RSF-164.175-122-7050-TR-49 from Raltron is a Band Pass Filter with Frequency 164.114 to 164.236 MHz, Bandwidth 122 kHz, Center Frequency 164.175 MHz, Insertion Loss 2.9 to 3.6 dB, Rejection 54 to 45 dB. Tags: Surface Mount, RF SAW Filter. More details for RSF-164.175-122-7050-TR-49 can be seen below.