Welded and drawn tubing, also known as "drawn over mandrel" (DOM), is typically welded tubing that is drawn through a die and over a mandrel to create a. Results 1 - 9 of 9 - Product Name, Alloy, Finish & Pattern, Outside Diameter, Wall, Length, Weight Each. Brass Tube, , Polished - No Pattern, 1/2"", 12'. Industrial Metal Supply stocks top quality steel tubing for all applications. Order your round, square, or telescoping steel tubes & more, today!