Taizhou Shuangji Gas Spring Co., Ltd. is a manufacturer of QD series gas springs, support rods, pneumatic support rods, pneumatic gas springs, stainless steel gas springs, seat shock absorbers, damping cylinders, and seat angle adjusters. Since its establishment, the company has continuously analyzed and researched similar products from external sources, and developed products based on their comprehensive research and development. The QD series gas springs have good performance and reasonable sales prices, and are highly praised by users. They are powered by high-pressure inert gas and have a constant support force throughout the entire working stroke. They also have a buffering mechanism, which is a major feature of ordinary springs, as well as advantages such as easy installation and maintenance. It has been applied to the opening of car engine covers and rear doors, drawing machines, aviation shelves, printing machinery, food processing machinery, modern automated mechanical equipment, fitness equipment, textiles, computers, furniture, woodworking machinery, etc.