The AM3750B1087 from Anatech Electronics is a Band Pass Filter with Frequency 3700 to 3800 MHz, Bandwidth 100 MHz, Center Frequency 3750 MHz, Rejection 30 to 40 dB, Upper Rejection 30 dB. Tags: Surface Mount, Ceramic, Ceramic Filter, Monoblock Filter. More details for AM3750B1087 can be seen below.