These grip covers are made from 100% medical grade silicon and can be autoclaved and reused. The nonporous grips are stain proof & non odor absorbent. The grips covers have a matt finish to give you superior comfort & fits to the natural contour of the hand. Fits Grip Sizes: 5/8" inch, 3/4" inch & 1" inch grips. Added Width: All grip covers add additional 1/2" inch to your existing grip size.