Features: brand new and high quality High Quality: The dust caps are made of premium aluminum alloy, which is firm while light in weight, resistant to rust and has a long service life. Practical Bike Accessories: The overall shape of the bike crankshaft dust cover is light and compact, with high hardness and easy installation. Fine Workmanship: The crank dust cover is CNC cut and anodized, the appearance is smooth and shiny, it is a good decoration for your bicycle. Color Style: There are 5 colors are available, also updating your bike. Colorful style, suitable for personality modificine. Lightweight and high quality. Replacements: The bike fixing bolt is wonderful replacement parts for your broken or old ones. It is used to fix the the cranks and crank of the chainwheel. Specifications: Material: Aluminum Alloy Color: Black/Red/Blue/Golden/Colorful Package Weight: approx.9g Style Options: M18/M19/M20 Inner Diameter: approx.10mm/0.39in Outer Diameter: approx.28mm/1.10in (More Size Details, Please See Photo.) Note: Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1Pc x Bicycle Crank Cap