Compression And Extension Spring Assortment - 200 Piece Set Of Heavy Duty And Durable Compressed Spring - Tools & Equipment, Hand Tools, Automotive, Replacement Parts - By Katzco WHAT YOU GET  A set of 200 pieces assorted heavy duty and durable compression and extension spring for shops and home repairs. This also includes high quality plastic storage case. QUALITY MATERIALS  These springs are made up of premium quality materials that is proven and tested for its heavy-duty functionality. Made of quality material that can withstand abusive stretches. EXTENSION SPRING: the spring is designed to operate with a tension load, so the spring stretches as the load is applied to it. Extended Springs includes: 8-pc. 5/16" x 1-1/8" 8-pc. 3/16" x 1-3/4" 10-pc. 13/64" x 13/16" 10-pc. 7/32" x 1". 10-pc. 9/32" x 1-1/2" 10-pc. 11/32" x 1-7/16" 10-pc. 1/4" x 7/8" 10-pc. 5/16" x 1-1/4". 12-pc. 5/16" x 1-3/4" 12-pc. 9/32" x 2" 12-pc. 5/32" x 3-1/8" 12-pc. 11/32" x 1-27/32" COMPRESSION SPRING: is designed to operate with a compression load, so the spring gets shorter as the load is applied to it. Compressed Springs includes 6-pc. 3/8" x 5/8" 8-pc. 23/64" x 1-3/8" 10-pc. 9/32" x 3/4" 10-pc. 1/4" x 13/32" 10-pc. 7/32" x 11/16" 10-pc. 9/32" x 1/2" 10-pc. 7/32" x 1-1/2" 12-pc. 3/8" x 3/4" 100% SATISFACTIONS: Katzco will make sure that you will be satisfied with this item you buy from us. You are protected with our 100% No Questions Asked Guarantee for either a replacement or refund. We care about only putting out high quality products that satisfy your needs. If there is anything you need that we dont offer, we go and find the best for you.