The BFHK-2802+ from Mini Circuits is a Band Pass Filter with Frequency 26.50 to 29.50 GHz, Center Frequency 28 GHz, Insertion Loss 2 to 4.5 dB, Upper Rejection 25 to 40 dB, Lower Rejection 25 to 50 dB. Tags: Ceramic, Ceramic Filter. More details for BFHK-2802+ can be seen below.