1. There is only two welding lines. After special treatment, welding lines can hold high strength of extension and is no obvious.
2. Zero starting force, restoring force is 2 times more than API 10D specification.
3. Easily installation, saving casing running time.
Professional customer service team, professional after-sale services create a comprehensive high-quality, advanced technology, reliable products, which gives you a strong sense of security.
Professionals, professional skills and precision equipments insure that we can provide you with professional product customization service.
The best quality products, strict quality control system and good reputations established Saigao product's irreplaceable place.
Superb technical team with continuous technological innovation, closely follow the market's trend help you to create the highest performance products.