The BSF-WG-7800-7880-40-WR112 from DETI Microwave is a Waveguide Filter with Frequency 7785 to 7890 MHz, Input Power 2000 W, Insertion Loss 0.15 to 0.4 dB, Operating Temperature 0 to 50 Degree C, Rejection 20 to 60 dB. Tags: Band Stop. More details for BSF-WG-7800-7880-40-WR112 can be seen below.