About Us – YNSTUBE Precision Tubing Solutions

Jiangsu YingNaiSi Machinery Manufacturing Co., Ltd. (YNSTUBE) is a professional manufacturer and exporter specializing in precision seamless steel tubes, hydraulic cylinder pipes, and custom-engineered tubing solutions for demanding industrial applications.

With about 20 years of experience serving clients across Europe, the Middle East, Southeast Asia, and North America, we have built a reputation for quality, reliability, and flexible customization.

 Our Core Products

• Precision Cold Drawn Seamless Tubes

• Honed & SRB Tubes for Hydraulic Cylinders

• ESP Tubing & High-Strength Casing

• Custom Hydraulic Cylinder

Our products are widely used in:

• Oil & Gas

• Hydraulic Systems

• Automotive

• Machinery Manufacturing

• Engineering Equipment

• Textile Machinery