Features1Manufacturing Material: Made of high quality aluminum alloy material, sturdy and durable, rust and corrosion resistant, which can undoubtedly effectively prolong its service life. 2Simple Operation: Simple and convenient installation, no complex steps. replacement for old or broken, easy to install, and easy to carry. 3Wide Applicability: RL229 product model, with wide range of application, suitable for 12mm / 0.5in, 15mm / 0.6in and 20mm / 0.8in hub. 4Strict Quality Control: Through rigorous testing, reliable quality, small size and compact, it is trustworthy and purchasable. 5Easy to Use: Easy to use and fine workmanship. Without any difficult requirements even though you use it for the first time.SpecificationItem Type:BikeHubRimTunerWeight: Approx.71g / 2.5ozMaterial: Aluminum AlloyProduct Model: RL229Application: Suitable For 12mm / 0.5in, 15mm / 0.6in And 20mm / 0.8in HubPackage List2 x Hub1 x Stents