Precision seamless tube is a kind of high precision steel tube material after cold drawing or hot rolling. As the precision steel tube inside and outside wall without oxide layer, under high pressure without leakage, high precision, high finish, cold bending without deformation, flaming, flattening without cracks and so on, so mainly used for the production of pneumatic or hydraulic components of products, such as cylinders or oil cylinders, can be seamless tube, there are also welded tubes.