Chromag Headset Spacer Kit Chromag's Headset Spacers are made of high performance 6061 Aluminum, and CNC machined in their native Canada. They feature a concave profile with a sleek label. They're lightweight and precise. Features Kit includes: 3 spacers (two - 5mm spacers and one - 10mm spacer) Material: CNC machined 6061 Aluminum | Chromag | Headset Spacer Kit | Purple | Headset Spacer Kit | Aluminum