The BWBF-8/12 from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 8 to 12 GHz, Center Frequency 10 GHz, Insertion Loss 1.7@10GHz, Rejection =25 dB @3.9GHz, =40 dB @14.8GHz, Upper Rejection 40 dB. Tags: Surface Mount. More details for BWBF-8/12 can be seen below.