The AM2000B1730 from Anatech Electronics is a Band Pass Filter with Frequency 1.8 to 2.2 GHz, Bandwidth 400 MHz, Center Frequency 2000 MHz, Insertion Loss 2.5 dB, Rejection 25 to 70 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for AM2000B1730 can be seen below.