This post contains affiliate links. As an Amazon Associate I earn from qualifying purchases Product Features Package included: 6pcs Black anodized aluminum alloy, sturdy and durable to use. 1-1/8 inch (28.6mm) aluminum alloy bike headset spacers, use for top outer diameter 28.6 mm forks. High: 10mm; Wall thickness:1.9mm, used for raising your handlebar Compatible with