Tension spring can be used in many occasions, such as production and assembly, experiment, research and development, maintenance, etc., ., Spring in the market occupies an important position, are widely used, marine, computer, electronics, automotive, mold, , chemical, aerospace, railway, wind power, thermal power, engineering machinery, mining machinery, construction machinery, elevators, and other fields Suitable for repairing accessories for home, construction machinery, electrical equipment, mechanical device and more. SPECIFICATION – Wire Dia.: 0.5mm/0.02... The following is the product explanation and application of the compressed spring . Uxcell Aluminum Disc, 6 150mm Diameter 0.02 0.5mm Thickness Round Aluminum Sheets 1060 Aluminum Circle Plates For Metal Stamping Stainless Steel Spring Sourcingmap Extension Spring - 0.3mm Wire Dia, 3mm OD, 300mm Free Length Spring Steel Small Dual Hook Tension Spring Industrial Small Spring Made of stainless steel material not easy to rust, more durable; high hardness, long service life, good corrosion resistance Wire Diameter:0.5mm/0.02"; Outer Diameter: 5mm/0.2" (OD); Free Length: 15mm/0.59" Made of stainless steel material not easy to rust, more durable; high hardness, long service life, good corrosion resistance Tension Spring most useful in gardens, as hang plants and swing seat ect. Tension Spring is used for fitness equipment.