The SF1186B-4 from Murata is a Band Pass Filter with Frequency 1.56 to 1.6 GHz, Bandwidth 20 MHz, Center Frequency 1575.42 MHz, Insertion Loss 2.7 to 4.5 dB, Power 0.01 W. Tags: Surface Mount, Ceramic, Surface Mount, Ceramic Filter. More details for SF1186B-4 can be seen below.