Reliable Manufacturing is a China class leader in drawn seamless, extruded seamless, and extruded structural aluminum tubing especially tailored for general engineering applications. Seamless and drawn seamless tube can be created from the following alloy selections: 1100, 2024, 3003, 5052, 6061, 6063, 7050, 7075. Extruded structural tubing can be produced from the following alloys: 6061, 6063.