17 Pack, 1/2 LB, 1/8", DC Aluminum Arc Flux Coated Rod, The Highest Strength Alloy For Arc & Torch Welding Of Low Alloy Aluminum, Excellent For Cast, Wrought & Extruded Aluminum In All Positions, Can Also Be Used As A Torch Brazing Alloy, Typical Applications: Truck Beds, Loading Ramps & Docks, Banisters, Stairs, Diamond Plate, Irrigation Piping, Engine Blocks, Transmission Housings & Railroad Frogs, Tensile Strength: 34,000 PSI, In Plastic Box.