ITEM NAME:4-pack 22mm Handlebars to 25mm Bar Mounts Risers Clamps Conversion Shims Description: Used to transform diameter 22 mm / 7/8 inch to 25 mm / 1 inch. Suit for 22 mm diameter handlebar. Made of Aluminum Alloy,sturdy and durable to use. Simply place one shim each side of clamp area on handlebar and insert into stem, tighten as normal. A safe and reliable way to fit a narrower bar to a wider stem. Specification: Material: Aluminum Alloy Size: 22 mm Package Includes: 4 Pieces Conversion Shims Spacers Note: Please check the size details before purchasing. Make sure you will get the perfect item. Thank you..4 Pieces Conversion Shims Spacers. Simply place one shim each side of clamp area on handlebar and insert into stem, tighten as normal. Make sure you will get the perfect item. Made of Aluminum Alloy,sturdy and durable to use.