This 2" x 4" Custom aluminum extrusion is commonly used in frame supported tent systems. Each length of tubing is drilled with parallel 5/16" diameter through holes located 3" from each end of the extrusion.
Specifications:
Base Material: 2" x 4" Custom 6061-T6 Structural Aluminum Extrusion, with a 0.125" wall thickness
Finish: Anodized Commercial Clear