This Metaltech Saferstack Double Lift Scaffold Set provides everything needed to frame a scaffold set. Frames are built with perimeter tubes that are 1 5/8in. 13-gauge steel and interior tubes that are 1in. 16-gauge steel. Pin spacing is 4ft. Each frame includes 8 coupling pins and 8 spring locks. Cross braces are galvanized and frames are powder-coated for corrosion resistance and durability. This set is easy to store and transport. Meets OSHA standards.