Features1Constructed of aluminium alloy, which is very durable 2Lightweight and easy to install and remove 33 different color fits for your demand, meets different needs 4 for adjusting your bike bottom bracket, flywheel or hub 5Also can be apply to BB axisSpecificationDescription:Our bottom bracket washer is made of high quality aluminium alloy, which is durable and lightweight to carry. Exquisite workmanship and convenient to install and remove.It is to get a good fit on your bike. for adjusting your bike bottom bracket, flywheel or hub. You are worth it.Features:1. Constructed of aluminium alloy, which is very durable.2.Lightweight and easy to install and remove.3. 3different color fits for your demand, meets different needs.4. for adjusting your bike bottom bracket, flywheel or hub.5.Also can be apply to BB axis.Specifications:Material: Aluminium AlloyPackage Weight: approx. 25gThickness: approx. 1.9mm / 0..1"External Diameter: approx. 40mm / 1.5"Inner Diameter: approx. 34.7mm / 1.3"Quantity: 15pcsPackage Included:15 x bottom bracket washersNote:1.Please allow 1-3mm error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please in kind prevail.Package List