The BSF-5597MS6 from RF ONE Electronics is a Band Stop Filter with Stopband Frequency 5.47 to 5.725 GHz, Insertion Loss 3 dB, Rejection 40 dB, Power 20 W, Return Loss 6 to 10 dB. Tags: Module with Connectors, Cavity Filter, Ceramic Filter, LC Filter. More details for BSF-5597MS6 can be seen below.