Product Details: 200pcs Small Spring Assortment Compression Extension Spring Metal Tension Spring Features: Great resilience and for durable use. Greater resistance to corrosion. Used for automotive engines, major appliances, medical devices, electronics, and sensitive measuring instruments. This item is spiral springs that offer resistance to a tension force, or load, applied along the axis of the spring. When a load is placed on an extension spring, making it longer, the spring pulls back against the load to return to its original length. These springs are used in a variety of applications, including automotive engines, major appliances, medical devices, electronics, and sensitive measuring instruments. Specifications: Color: Silver Material: galvanized steel Size:20 SIZES: Compression springs - 10 9/32 inch x 1/2 inch, 10 1/4 inch x 13/32 inch, 10 7/32 inch x 11/16 inch, 6 3/8 inch x 5/8 inch, 12 3/8 inch x 3/4 inch, 10 9/32 inch x 3/4 inch, 8 23/64 inch x 1-3/8 inch, and 10 7/32 inch x 1-1/2 inch; Extension springs - 10 13/64 inch x 13/16 inch, 10 7/32 inch x 1 inch, 10 1/4 inch x 7/8 inch, 8 5/16 inch x 1-1/8 inch, 10 5/16 inch x 1-1/4 inch, 12 11/32 inch x 1-27/32 inch, 12 5/16 inch x 1-3/4 inch, 12 9/32 inch x 2 inch, 12 5/32 inch x 3-1/8 inch, 8 3/16 inch x 1-3/4 inch, 10 9/32 inch x 1-1/2 inch, and 10 11/32 inch x 1-7/16 inch Package Included: 200 x PCS spring Assortment Kit Notes: The colors may be a little different for the different monitor display. Please allow minor deviation due to manual measurement