Durable: Made of Metal material, anti-rust plating, very suitable for small projects and home or small engine maintenance.Compact: Comes with a beautiful box for your storage. Lightweight and portable. The package contains a variety of different sizes to meet your needsContains 20 Sizes:10pcs 9/32 inch x 1/2 inch10pcs 1/4 inch x 13/32 inch10pcs 7/32 inch x 11/16 inch6pcs 3/8 inch x 5/8 inch12pcs 3/8 inch x 3/4 inch10pcs 9/32 inch x 3/4 inch8pcs 23/64 inch x 1-3/8 inch10pcs 7/32 inch x 1-1/2 inch10pcs 13/64 inch x 13/16 inch10pcs 7/32 inch x 1 inch10pcs 1/4 inch x 7/8 inch8pcs 5/16 inch x 1-1/8 inch10pcs 5/16 inch x 1-1/4 inch12pcs 5/16 inch x 1-3/4 inch12pcs 11/32 inch x 1-27/32 inch12pcs 9/32 inch x 2-13/16 inch12pcs 5/32 inch x 3-1/8 inch8pcs 3/16 inch x 1-3/4 inch10pcs 9/32 inch x 1-1/2 inch10pcs 11/32 inch x 1-7/16 inchMaterial:metalcolour:SilverPackage Contents:200 * Extension and Compression Spring Combination KitOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.