Our "Alignment Weld Sleeve" allows the fabricator to align, hold and weld two pieces of mild steel tube without help. Because no rod is needed, the welder has a free hand. The "Alignment Sleeve" assures a perfectly aligned joint with no weld slag inside to reduce the tube diameter and restrict air flow. Perfect alignment and just the right amount of welding material results in a very professional looking weld. Weld Sleeves are packaged 20 sleeves per bag.