AR offers a standard product line of low loss microwave waveguide. The WF1800 and WR1800 series are recommended for the output of our Model 200T8G18A, Model 500T8G18 and Model 1000T8G18B broadband microwave power amplifiers. The Model WF is flexible and twistable waveguide. The Model WR is rigid waveguide. The Model WT (90°) is Rigid Twist Waveguide. The Model WS is seamless waveguide. The Model WB is E or H bend 90°. All microwave waveguides on this specification are export-classified as EAR99.