The BSF-WG-29700-29900-25-WR34 from DETI Microwave is a Waveguide Filter with Frequency 29.7 to 29.9 GHz, Input Power 250 to 350 W, Insertion Loss 1 dB, Operating Temperature 25 to 40 Degree C, Rejection 25 dB @29.7 to 29.9 GHz. Tags: Band Stop. More details for BSF-WG-29700-29900-25-WR34 can be seen below.