The AM1290B1026 from Anatech Electronics is a Band Pass Filter with Frequency 1.29 to 1.3 GHz, Bandwidth 10 MHz, Center Frequency 1290 MHz, Insertion Loss 4 dB, Upper Rejection 30 dB @ 1325 MHz. Tags: Ceramic, Surface Mount, Ceramic Filter. More details for AM1290B1026 can be seen below.