Dundee Products is the manufacturer of Welded Steel Tubing. It is an ISO 9001:2000 Certified company. We offer a near infinite number of steel tubing sizes and shapes, Round steel tubing sizes range from 5/8" to 3" O.D. with wall thickness' from .035" through .120". Carbon ranges go from C-1008 to C-1010, Other Steel Tube Shapes: Rectangular, Hexagon, Square, Other Types: Perforated steel tube, Metals Available: Hot rolled pickled and oiled steel tubing, cold rolled steel tubing, galvanized steel tubing(limited), electro-galvanized steel tubing, and galvannealed steel tubing in commercial quality or aluminum killed steel tube.