The PDBF-16R5/17R5-5D3 from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 16.5 to 17.5 GHz, Center Frequency 17 GHz, Insertion Loss 4.0@17GHz, Rejection =30 dB @15&19.1GHz, Upper Rejection 30 dB. Tags: Surface Mount. More details for PDBF-16R5/17R5-5D3 can be seen below.