The BFHK-6751+ from Mini Circuits is a Band Pass Filter with Frequency 5900 to 6900 MHz, Bandwidth 1000 MHz, Center Frequency 6.4 GHz, Insertion Loss 3.1 to 5.0 dB, Upper Rejection 80 to 90 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for BFHK-6751+ can be seen below.