Description: 1 Pair Bicycle Bike Handlebar Bar Shim Spacer Stem Reducer 25.4mm to 31.8mm. When the 25.4 thick handlebar is to be mounted on the 31.8-diameter handlebar, it is necessary to use the this 25.4~31.8 stem reducer. Made of high quality aluminum alloy, durable and practical. Simple and quick Installation, directly buckled in the handlebar installation position, you can change the 25.4 round tube to 31.8. Aluminum alloy handlebar shim, make the handlebar lock more firmly, longer life than plastic material, and safer. Specification: Material: Aluminum Alloy Color: Golden, Green, Blue, Purple, Black Size: 25.4-31.8 mm Package Includes: 1 Pair Handlebar Shim(4 Pack) Note: 1. Please allow a slight color difference between the real item and the pictures due to the difference between monitors. 2. Please allow a slight measurement error. Hope for your kind understanding and have a nice shopping day!