Key Specifications, Waveguide Size 1: WR-137, Flange Size 1: CPR-137G, Waveguide Size 2: WR-137, Flange Size 2: CPR-137G, Length: 6 inches, Frequency, Min: 5.85 GHz, Frequency, Max: 8.2 GHz. WR-137 Commercial Grade Straight Waveguide Section 6 Inch Length with CPR-137G Flange Operating from 5.85 GHz to 8.2 GHz. PE-W137S002-6 WR-137 waveguide section is straight and is 6 inches long. This 6 inch WR-137 straight waveguide section from Pasternack is commercial grade and has a CPR-137G flange. Our straight WR-137 waveguide section with CPR-137G flange has a minimum frequency of 5.85 GHz and a maximum frequency of 8.2 GHz. WR-137 waveguide section PE-W137S002-6 is part of over 40,000 RF, microwave and millimeter wave components. Our commercial grade WR-137 straight waveguide section will ship same the day as it is purchased worldwide as with our other RF parts.