6463-T66 and T67 Alloy Aluminum Pipe is a variation of 6063 Alloy Aluminum and available as Bright Dipped Polished as well as Bright Dipped Brushed finish. Commonly used in marine fabrication for structures such as Poling Platforms, Tuna & Marlin Towers, T-Tops, Bow Rails, and Leaning Posts, just to name a few.