200pcs spring kit include 20 kinds of tension and compression springs of different sizes, made of zinc spring steel, which is very durable and can be used for a long time. Compression spring sizes: 9/32" x 1/2", 1/4" x 13/32", 7/32" x 11/16", 3/8"x 5/8", 3/8" x 3 /4", 9/32" x 3/4", 23/64" x 1-3/8", 7/32" x 1-1/2". Tensile spring size: 13/64 "x 13/16", 7/32 "x 1", 1/4 "x 7/8", 5/16 "x 1-1/4", 5/16 "x 1 -3/4" Application: Spring kit is suitable for various repairs and maintenance of automobiles, hand tools, replacement parts, tools and equipment. Tips: The spring is placed in the storage box with the size label, which is very convenient. Fine workmanship. If you have any problems when using the product, please contact us in time, and we will deal with it in time.