The AT-BPF-6471-12 from AT Microwave is a Waveguide Filter with Frequency 64 to 71 GHz, Insertion Loss -2.5 to -1.5 dB, Operating Temperature -40 to 71 Degree C, Rejection -40 to -30 dBc, Rejection Frequency DC to 90 GHz. Tags: Band Pass. More details for AT-BPF-6471-12 can be seen below.