1. CNC machined aluminum alloy for high strength and durability. 2. Easy to install without drilling or welding. 3. Compact size improves the appearance of your motorcycle. 4. Remove the gasket, it can tighten the 28mm handlebar. 5. Do not remove the gasket, it can tighten the 22mm handlebar. Specification: Condition: Brand Item Type: Handlebar Riser. Optional Color: Gold, Red, Black, Gray, Blue, Silver Material: CNC Aluminum Alloy. Size: approx. 28mm (1.1 inch), 22mm (0.87 inch) (by removing the gasket, it can tighten the 28mm handlebar; without removing the gasket, it can tighten the 22mm handlebar) Package List: 2 x handlebar risers 4 gaskets 4 x screws (installed)