Feature: 4x Stopwatch Washers (2x 25.4 Washers 2x 31.8 Washers) Made of plastic, black appearance Bicycle Handlebar Conversion Spacer 25.4mm to 31.8mm Aperture Adjustment Adapter Suitable for For compatible with Garmin For Blackbird For Xingzhe Specification: Product Name: Bicycle 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. Compatibility - 4 PC Front Mount Gasket Bicycle Handlebar Washer Ring 31.8/ 25.4mm For compatible with Garmin Good Performance Materials - These bike accessories are made of premium material, ensuring their durability and long-lasting performance. Optimal Performance - These accessories offer versatility and adaptability to different cycling needs and provide optimal performance and reliable functionality enhance the riding experience and ensure safety. Easy Installation - These accessories can be easily installed on your bike to get your bike running again. After-sale Serive - We provide high quality products, if there is any problem with our product, please contact us.