Feature●Packaging and surface treatment: during the production process, the surface of the spring is galvanized after heat treatment. It has good rust resistance, high ductility resilience strong tensile strength, and the product is more durable, packed in transparent and lightweight plastic box, which is convenient for you to carry and store safely when needed in different occasions●Compression spring: 21 kinds of spring combinations, among which 10 kinds of compression springs have different sizes and specifications and wide applicability. The compression spring after heat treatment has good resilience, can meet your different needs for multiple spring specifications●Stretch spring: 11 kinds of stretch spring, professionally designed to stretch from the middle of the spring, stronger than the spring stretched from the edge, more uniform force, longer fatigue resistance, longer service life, make your products durable●Functions and uses: commonly used in household appliances, daily tools, medical devices. Repair and maintenance of electronic equipment, office supplies, molds and other products, whether you are a home, store or factory, a box of spring set combination can help you solve many troubles and troubles around you.●Specifications: there are corresponding size chart labels in the box for easy identification.Description Product Name: Spring Number of Products: 200PCs Material: spring steels Specifications: 11 kinds of tension spring size table: 0.3*3*20mm/0.011*0.11*0.79 "10PCs 0.4*4 * 20mm/0.016*0.16*0.79" 10PCs 0.5*4.5*20mm/0.02*0.177*0.79 "10PCs 0.5*4.5 * 25mm/0.02*0.177*0.99" 10PCs 0.6*5*30mm/0.023*0.2*1.19 "10PCs 0.6*5 * 25mm/0.023*0.2*0.99" 10PCs 0.7*6*25mm/0.027*0.24*0.99 "10PCs 0.7*6 * 30mm/0.027*0.24*1.19" 10PCs 0.8*7*30mm/0.031*0.276*1.19 "10PCs 0.8*7 * 35mm/0.031*0.276*1.38" 5PCs 0.9*8 * mm/0.035*0.31*1.77 "5PCS 10 kinds of compression spring size table: 0.3*4*30mm/0.011*0.16*1.19 "10PCs 0.4*5 * 30mm/0.016*0.2*1.19" 10PCs 0.5*6*15mm/0.02*0.24*0.59 "10PCs 0.5*6 * 25mm/0.02*0.24*0.99" 10PCs 0.6*7*20mm/0.023*0.276*0.79 "10PCs 0.6*7 * 10mm/0.023*0.276*0.39" 10PCs 0.7*7.5*25mm/0.027*0.295*0.99 "10PCs 0.7*7.5 * 15mm/0.027*0.295*0.59" 10PCs 0.8*8.5*25mm/0.031*0.33*0.99 "10PCs 0.8*8.5 * 30mm/0.031*0.33*1.19" 10PCs