The AT-BPF-120-08 from AT Microwave is a Waveguide Filter with Frequency 119 to 121 GHz, Insertion Loss -2.5 to -1 dB, Operating Temperature -40 to 85 Degree C, Rejection 40 dB, Rejection Frequency DC to 140 GHz. Tags: Band Pass. More details for AT-BPF-120-08 can be seen below.