The BSF-W-00017 from Exceed Microwave is a Waveguide Filter with Frequency 25 to 28.4 GHz / 28.6 to 32 GHz, Insertion Loss 0.2 dB, Operating Temperature -50 to 85 Degree C, Rejection 40 to 60 dB, Rejection Frequency 28494 to 28506 MHz / 28485 to 28515 MHz. Tags: Band Stop. More details for BSF-W-00017 can be seen below.