The AM1575B1031 from Anatech Electronics is a Band Pass Filter with Frequency 1.57 to 1.58 GHz, Bandwidth 6 MHz, Center Frequency 1575.4 MHz, Insertion Loss 3 dB, Upper Rejection 20 dB Center-50 MHz. Tags: Ceramic, Surface Mount, Ceramic Filter. More details for AM1575B1031 can be seen below.