The RSF-1250.00-10000-3030-TR from Raltron is a Band Pass Filter with Frequency 1245 to 1255 MHz, Bandwidth 10000 kHz, Center Frequency 1250 MHz, Insertion Loss 3.5 dB, Rejection 30 to 40 dB. Tags: Surface Mount, RF SAW Filter. More details for RSF-1250.00-10000-3030-TR can be seen below.