Check the listing for details. 2.5x18x90mm(WxODxL) Extension Spring Steel Extended Compressed Spring Black. Condition: New. Listed at 10.67 USD. Product Details:Color: BlackMaterial: Manganese SteelTotal Size: 90mm x 18mm/ 3.54" x 0.71"(Length*Outer Dia.)Wire Dia.: 2.5mm/0.098"Package Content: 1pcs x Extension SpringMaterial - Made of higher-strength manganese steel material for durability, the extension spring is rust and abrasion-resistant, and has good toughness, strong load-bearing capacity and good mechanical properties which can be used for a long time.Feature - The extension spring has great elasticity properties, can give resistance to a pulling force, reduce shock and vibration of machinery, and can also be connecting component to increase tension.Application - The extension spring is widely used for industrial equipment, construction machinery, household appliance, mechanical equipment etc.