FREE SHIPPING) 1.5" sch40 (1.9" od x 0.145" wall) aluminum pipe frame,2"x 2"x 3/16" aluminum angle for table top and seats. With all stainless steel hardware included. Zero maintenance and will never rust. Designed to screw boards on from underneath. no screw heads or bolt heads showing on top of the table. All you need to purchase is lumber from your local lumber yard. Why pay to ship lumber when you can get it at your local lumber yard. Designed for 2"x 6"x(length of table) or 2"x12"x(length of table) lumber.