The shim has a 1-1/8" OD and 1" ID (1/16" wall) which is exactly what most 1-1/8" steel steerers have (some have thinner walls) So if you have a dead 1-1/8" fork kicking around check the ID (you can simply slip your fork into the end as a quick check, it should be a tight slip fit), and it it's a pass you have the right material for a shim. Simply saw off a section, and split it down one side and you're good to go.
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