Features 1、High Strength Material: The spring kit is made of zinc plated steel, which is rust resistant, has maximum strength, and has a long service life, providing additional durability for appropriate tension. 2、20 Kinds Springs: The spring assortment set includes 200 PCS and 20 spring styles. This cotter pin assortment includes 8 sizes of compression springs and 12 sizes of extension springs, which can meet your different needs. 3、Multipurpose: You can choose from 200 different sizes of spring units to meet most of your life and work needs, such as car repairs, home repairs, DIY projects, etc. 4、Direct Replacement: The compression and extension springs kit is easy to install and disassemble. Rusted or missing springs can be quickly replaced with these sturdy steel springs for easy use. 5、Portable: The convenient transparent storage box holds all the springs together, making it easy to carry, organize. With size markings, which means you can easily find the required springs. Specification Item Type: Spring Assortment Kit Material: Zinc Coated Steel Extension Springs Include: 5.16x 20.6mm ( 13/16inx 13/64in) --- 10pcs; 7.93 x 28.5mm(5/16in x 1-1/8in) --- 8pcs 5.33 x 25.4mm(7/32in x 1in) --- 10pcs; 6.35 x 22.2mm(1/4in x 7/8in) --- 10pcs 7.93 x 31.7mm(5/16in x 1-1/4in) --- 10pcs; 8.73 x 46.8mm(11/32in x 1-27/32in) --- 12pcs 7.93 x 44.4mm( 5/16in x 1-3/4in) --- 12pcs; 7.14 x 50.8mm( 9/32in x 2in) --- 12pcs 3.96 x 79.3mm( 5/32in x 3-1/8in) --- 12pcs; 4.76 x 44.4mm( 3/16in x 1-3/4in) --- 8pcs 7.14 x 38.1mm( 9/32in x 1- 1/2in) --- 10pcs; 7.73 x 36.5mm( 11/32in x 1- 7/16in) --- 10pcs Compression Springs Include: 7.14 x 12.7mm( 9/32in x 1/2in) --- 10pcs 9.52 x 15.8mm(3/8in x 5/8in) --- 6pcs 6.35 x 10.3mm( 1/4in x 13/32in) --- 10pcs 9.52 x 19.05(3/8in x 3/4in) --- 12pcs 5.55 x 17.46mm( 7/32in x 11/16in) --- 10pcs 9.1 x 34.9mm( 23/64in x 1-3/8in)8pcs 5.55 x 38.1mm( 7/32in x 1- 1/2in) --- 10pcs 7.14 x 19.05mm( 9/32in x 3/4in) --- 10pcs Application: Our springs has 200pcs in a box that comes in 20 different sizes is widely applied in construction, automobiles, shops, aircraft, machinery, electrical appliances, furniture and other fields, for splicing and object fastening between sheet metal. Replace old, rusted, busted, or missing springs with these strong steel springs in any shop or household application. Package List 1 x Compression and Extension Springs Kit (200PCS) 1 x Storage Box