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 MTB 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 alloy Color: black Quantity: 4pcs 4Pcs Size(Height): Approx. 5mm/10mm/15mm/20mm Package Weight: Approx 30g Suitable for: 28.6mm Bicycle Front Stem Fork<br><br>Package included: 4 x Headset Spacer Only the above package content, other products are not included. Note: Light reflection 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.