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Aluminum tight-radius donuts gain a tighter radius bend than our mandrel-bent tube. Primarily used for tight/compact installations, these donuts have a thick 2mm (14 gauge) wall and are sold by the WHOLE AND WELDED OUTSIDE ONLY. They are suitable for welding, polishing, or coating. Perfect for that custom Intercooler or Exhaust system that requires tight bends and corners. The donut can be cut at any degree of bend needed. The donut is often used with regular U-bends and any other mandrel piping. Because the radius of the donut is so tight, both wall thickness and durability are more consistent.*Inner seam will require finish weld after cutting