Made from tough and durable 2014 aluminium, the four sizes in the Hope Space Doctor Headset spacers pack include two 5mm, one 10mm and one 20mm size. This enables you to run a low and slammed setup (ideal for road racing or cross country (XC) riding) or a more upright setup (ideal for road endurance, all mountain (AM) or enduro riding). The colouring and finish on these custom machined head spacers complement Hope's headsets and stems perfectly.