The AM3500B1088 from Anatech Electronics is a Band Pass Filter with Frequency 3.4 to 3.6 GHz, Bandwidth 200 MHz, Center Frequency 3500 MHz, Insertion Loss 1.2 dB, Upper Rejection 40 dB @ 3800 MHz. Tags: Ceramic, Surface Mount, Ceramic Filter. More details for AM3500B1088 can be seen below.