Feature: 4x Stopwatch Washers(2x 25.4 Washers 2x 31.8 Washers) Made of plastic, black appearance Handlebar Conversion Spacer 25.4mm to 31.8mm Aperture Adjustment Adapter Suitable for compatible with Garmin For Blackbird For Xingzhe Specification: Product Name: Computer Holder Spacer Material: Plastic Size: 25.4mm/ 31.8mm Color: Black Package Content： 4x Stopwatch Washers(2x 25.4 Washers 2x 31.8 Washers) Note: 1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2. Please allow slight manual measurement deviation for the data. Features: 4x Stopwatch Washers for Bicycle Handlebar 25 4mm and 31 8mm Compatible Material: light weight, good strength and well temperature resistance, good impact resistance Appearance and performance: automatic cutting, smooth edge, fit most of the road bicycles, delicate texture. Compatibility: smooth surface and exquisite workmanship, fit most of the bicycles. Easy Installation: Brand new and high quality, easy to install.