Add a flash of color to your handlebars. Alloy Bar End Plugs are precision engineered and machined using lightweight, durable 6061-T6 aluminum. They are compatible with mountain and road bike handlebars thanks to an expanding wedge that makes a secure fit for most inner bar diameters. COMPATIBILITY - Works with mountain and road bike handlebars. The expanding wedge makes a secure fit for most handlebar diameters. - Compatible with handlebars measuring 18mm to 21.5mm inner diameter. - Use 3mm hex tool (not included) to secure bar end plugs. Tighten until snug; DO NOT OVERTIGHTEN TECH SPECS - Weight: 17g for set of two - Alloy plug diameter: 26.6mm - Compatible handlebar inner diameter range: 18mm - 21.5mm - Material: 6061-T6 aluminum cap, black anodized 7075 aluminum bolt, glass-filled nylon expanding wedge - Made in the USA