Key Specifications, Waveguide Size 1: WR-12, Flange Size 1: UG-387/U, Waveguide Size 2: WR-12, Flange Size 2: UG-387/U, Length: 3 inches, Frequency, Min: 60 GHz, Frequency, Max: 90 GHz. WR-12 Instrumentation Grade Straight Waveguide Section 3 Inch Length with UG-387/U Flange Operating from 60 GHz to 90 GHz. PE-W12S001-3 WR-12 waveguide section is straight and is 3 inches long. This 3 inch WR-12 straight waveguide section from Pasternack is instrumentation grade and has a UG-387/U flange. Our straight WR-12 waveguide section with UG-387/U flange has a minimum frequency of 60 GHz and a maximum frequency of 90 GHz. WR-12 waveguide section PE-W12S001-3 is part of over 40,000 RF, microwave and millimeter wave components. Our instrumentation grade WR-12 straight waveguide section will ship same the day as it is purchased worldwide as with our other RF parts.