BRAKEQUIP H/D COPPER WASHER 8MM ID

It's an 8mm inner diameter, so it'll fit any bolt or fitting that size.

Eight millimeters on the inner diameter, precision-machined to fit without slop. Copper handles heat well and conducts it away from the joint, so high-temperature environments are actually where this material tends to shine. Corrosion resistance is also built into the nature of the copper itself, so if you're running anything where moisture or fluid exposure is a concern, that's covered too.