The SF2143B from Murata is a Band Pass Filter with Frequency 76.76 to 84.16 MHz, Bandwidth 3.7 MHz, Center Frequency 80.46 MHz, Insertion Loss 16 to 18 dB, Power 0.01 W. Tags: Surface Mount, Ceramic, Surface Mount, IF SAW Filter, Ceramic Filter. More details for SF2143B can be seen below.