The AT-BPF-141148-06 from AT Microwave is a Waveguide Filter with Frequency 141 to 148.5 GHz, Insertion Loss -2.5 to -1 dB, Operating Temperature -40 to 85 Degree C, Rejection -40 dB, Rejection Frequency DC to 170 GHz. Tags: Band Pass. More details for AT-BPF-141148-06 can be seen below.