The BWBF-16R5/17R5 from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 16.5 to 17.5 GHz, Center Frequency 17 GHz, Insertion Loss 6.5@17GHz, Rejection =40 dB @15.2 &18.6GHz, Upper Rejection 40 dB. Tags: Surface Mount. More details for BWBF-16R5/17R5 can be seen below.