Wheels MFG Stack Right Headset Spacer Kit Stack Right Headset Spacers look great and stay that way! No more misaligned headset spacers thanks to the Stack Right technology, which locks spacers together with an interlocking channel for a clean, sleek look. Features Fits 1-1/8" threadless fork steerer Precision-machined 6061 aluminum Interlocking Stack Right technology SPECIFICATIONSInner Diameter28. 9mm Outer Diameter34. 4mm Included Sizes1. 5mm (2), 2. 5mm (2), 5mm (1), 10mm (2)Variant MFG#Black SRHS-SPK1Blue SRHS-SPK1-6Green SRHS-SPK1-9Orange SRHS-SPK1-3Purple SRHS-SPK1-7Red SRHS-SPK1-1Teal SRHS-SPK1-5 | Wheels Manufacturing | Stackright Headset Spacer Kit Blue | Aluminum