Prox Valve Shim Assortment 450cc 9.48 from 1.225 to 3.475

*9.48mm diameter - Includes three valve shims in each size between 1.225mm and 3.475mm in .05mm increments. 141 shims in total. (example: 1.225mm, 1.275mm, 1.325mm, 1.375mm) * ProX Valve shims are made of premium materials. Specified heat-treatment processes ensures the hardness of the shims to offer maximum durability and less wear. ProX shims are precision machined to the exact OEM size specifications. All kits contains 3 shims in different sizes, with a handy plastic storage box with seperate compartments to stop your shims from intermingling.