This headset spacer set is crafted from high-quality aluminum alloy, offering durability and practicality for your biking needs. It is lightweight, easy to install, and features a smooth surface with exquisite workmanship. The set includes four different sizes to accommodate various requirements. Features: Constructed from eco-friendly, sturdy aluminum alloy. Lightweight and easy to install with a smooth surface finish. Compatible with 28.6mm front stem forks for MTB, mountain bikes, and road bikes. Includes four sizes (5mm, 10mm, 15mm, 20mm) in one pack to meet diverse needs. Specifications: Material: Aluminum Alloy Color Options: Red, Gold, Silver, Black, Blue Set Sizes (Height): Approx. 5mm, 10mm, 15mm, 20mm Designed for 28.6mm bicycle front stem forks Item Weight: 32g (1.1 ounces) Package Size: 100mm x 50mm x 30mm (3.9 x 2.0 x 1.2 inches) Package Weight: 36g (1.3 ounces) Packing List: 4 Bike Headset Washers