The BFHKI-1272+ from Mini Circuits is a Band Pass Filter with Frequency 11900 to 12800 MHz, Bandwidth 900 MHz, Center Frequency 12.35 GHz, Insertion Loss 3.5 to 5 dB, Upper Rejection 25 to 35 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for BFHKI-1272+ can be seen below.