Color: Silver; Material: 304 Stainless Steel; Wire Diameter: 0.8 mm / 0.03 inch; Outer Diameter: 8 mm / 0.31 inch(OD); Free Length: 200 mm / 8 inch; Packing List: 2pcs x Extension Spring. FEATURES: The double hook extension spring is made of 304 stainless steel material, which has excellent corrosion resistance and is not easily rusted. It is also wear-resistant, heat-resistant, and non-deformable, allowing for long-term use. In addition, the spring has excellent elasticity, which allows it to control the movement of the machine, reduce shock and vibration, and measure force, among other applications. APPLICATION: Tension spring can be used in many occasions, such as production and assembly, experiment, research and development, maintenance, home repair, etc. Widely use for furniture, appliances, work, gate, screen doors and repair projects. INSTRUCTION: The extended spring design with double hook, which can be better fixed on the mechanical equipment to ensure the stable operation of the equipment. NOTE: Please wear work gloves to protect your hands when replacing the spring.