The RF1172C from Murata is a Band Pass Filter with Frequency 433.42 to 434.42 MHz, Bandwidth 0.5 MHz, Center Frequency 433.92 MHz, Insertion Loss 3 to 5 dB, Power 0.01 W. Tags: Surface Mount, Ceramic, Surface Mount, RF SAW Filter, Ceramic Filter. More details for RF1172C can be seen below.