The RSF-428.000-12000-3030-TR from Raltron is a Band Pass Filter with Frequency 422 to 434 MHz, Bandwidth 12000 kHz, Center Frequency 428 MHz, Rejection 3 to 50 dB, Upper Rejection 3 to 50 dB. Tags: Surface Mount, RF SAW Filter. More details for RSF-428.000-12000-3030-TR can be seen below.