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. Available in a variety of anodized color options that match Wolf Tooth headsets, stem caps, seatpost clamps, bolts, and more. COMPATIBILITY Works with mountain and road bike handlebars. The expanding wedge makes a secure fit for most handlebar diameters. Compatible with handlebars measuring 18 mm to 21.5 mm inner diameter. Use 3 mm hex tool (not included) to secure bar end plugs. Tighten until snug; DO NOT OVERTIGHTEN. SPECIFICATIONS Weight: 17 g per set of two Material: 6061-T6 aluminum cap, black anodized 7075 aluminum bolt, glass-filled nylon expanding wedge Made in the USA