Cold-drawn precision seamless steel pipes, with their no oxide layer on the inner and outer walls, excellent high-pressure bearing capacity, high precision and high finish, and no cracks during cold bending, expansion and flattening, have become an ideal choice for mechanical structures, hydraulic equipment, and automotive and motorcycle pneumatic or hydraulic components, such as cylinders or oil cylinders. Its production process goes through multiple links such as hot-rolled rough tubes, rough tube inspection and grinding, pickling and re-inspection, cold drawing, straightening, pickling and lubrication, fine drawing, and finished product pre-treatment. Each link is strictly controlled to ensure product quality.