Descriptions:200 springs in a clear field for straightforward use and storage. There is a corresponding length within the box.8 sizes compression springs and 12 sizes extension springs to fulfill varied needs.The springs are made of steel material, durable, rustproof, sturdy and springy in the correct quantity of tension.Widely used for tools and equipment, hand tools, automotive, replacement elements etc.Compression springs: 7x13mm, 6x12mm, 5.5x27mm, 9.5x16mm, 9x18mm, 9x35mm, 5.5x38mm, 7x19mm.Extension springs: 5x10mm, 5.5x14mm, 6x10mm, 8x13mm, 7.5x17mm, 8.5x26mm, 8x50mm, 7x55mm, 4x70mm, 5x34mm, 7x25mm, 8x23mm.Specifications:Name: 200PCS springSpring material: steel(Galvanizing treatment)Box material: PPSpring color: silverBox size: about 21x11x3cm (LxWxH)Scope of application: bicycles, locks, cars, plastics, electric appliances, switches, hardware, molds, lamps, a number of uses, toysUses: toys, cars, sofas, hardware, a number of uses, plasticWorking mode: compressionPackage Included:200pcs/set of springs (with storage box)Note:1. Due to the sunshine difference, the item's coloration could also be barely diversified from the pictures.2. Please enable 1-3mm differences because of manual measurement.