1-1/2" to 1-1/8" Headtube Headset Reducer / Adapter 1.5" to 1.125" Frames that use 1-1/2" headsets converted to use 1-1/8" headsets Machined Aluminum (6061-T6) - Designed and Modeled in the USA! Works with straight steerer tubes only (non-tapered) Black Anodized Finish