The ERZ-BPF-0350-0610-2.1 from ERZIA is a Band Pass Filter with Frequency 3.5 to 6.1 GHz, Insertion Loss 1.2 to 2.1 dB, Rejection 30 dB @3.14 GHz & 6.38 GHz, 60 [email protected] GHz & 6.67 GHz, Power 10 W, Return Loss 13.6 to 18 dB. Tags: Module with Connectors, Suspended Substrate Filter. More details for ERZ-BPF-0350-0610-2.1 can be seen below.