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SPEC DF-1.3 All Guns are Not Created Equal. A welding gun should be durable, easy to use and customized to your specific application. Our guns put you in control: you choose the options you need and we'll build a gun to last. We even ship most of our guns within 24 hours. 350 Amp Dura-FluxTM gun shown with CenterfireTM contact tip, sleeved 6 inch neck with 60. bend and trigger guard. Built for welders using self- shielded flux-cored wire, Dura-Flux guns are designed for exceptional performance a