Our headset spacer is made of high-quality aluminum alloy material, sturdy and durable to use. They are lightweight and easy to install, having smooth surface and exquisite workmanship. 4 different sizes into one pack could fit for your demand and meet different needs. They are suitable for 28.6mm bicycle front stem fork.Features:Made of high-quality aluminum alloy material, eco-friendly, sturdy and durable to use. Lightweight and easy to install, having advantages of smooth surface and exquisite workmanship. Perfectly suitable for 28.6mm front stem fork of mountain bike, road bike etc. 4 different size(5mm/10mm/15mm/20mm) into on pack, they could fit for your demand and meet different needs.Specifications:Material: Aluminum alloyColor: silverQuantity: 4pcs4Pcs Size(Height): Approx. 5m/10mm/15mm/20mmPackage Weight: Approx 30gSuitable for: 28.6mm Bicycle Front Stem ForkPackage Included:4 x Headset SpacerOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.