The SF2138B from Murata is a Band Pass Filter with Frequency 131.5 to 156.5 MHz, Bandwidth 12.5 MHz, Center Frequency 144 MHz, Insertion Loss 13.7 to 15.5 dB, Power 0.01 W. Tags: Surface Mount, Ceramic, Surface Mount, IF SAW Filter, Ceramic Filter. More details for SF2138B can be seen below.