The QMC-BPF28-3502 from Quantum Microwave is a Waveguide Filter with Frequency 34.5 to 36.5 GHz, Insertion Loss 1 to 1.5 dB, Rejection 30 dB, Rejection Frequency 26.5 to 33 GHz / 38.5 to 40 GHz. Tags: Band Pass. More details for QMC-BPF28-3502 can be seen below.