The BWBF-5/13-7C2 from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 5 to 13 GHz, Center Frequency 9 GHz, Insertion Loss 3.0@9GHz, Rejection =40 dB @3.3&16.5GHz, Upper Rejection 40 dB. Tags: Surface Mount. More details for BWBF-5/13-7C2 can be seen below.