Hot Cams Valve Shim Kit KTM 250 / 350 / 450 / 500 / 505 The Hot Cams Valve Shim Kit offers a precise range of 8.90mm OD shims varying in thickness from 1.72mm to 2.60mm in 0.05mm increments. With each size represented by three shims, the kit is designed for durability, boasting a hardness rating of 50-60 Hrc. This exhaustive selection ensures you're equipped for the task at hand, all included in one complete set for enhanced engine performance and longevity. Features: 8.90mm OD 1.72 to 2.60mm Kit .05mm Increments 3 of each shim Hardness 50-60 HRC Sold as a kit