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PT-1770 EC34/28.6 | EC34/30 1-1/8" , Threadless Headsets Ø28.6 * 34 *30 Height: 16+ 12= 28mm Weight: 114g Bearings: 5/32" * 22 ball retainer Material: Steel / Alloy Finish: Anodized PT-1770 Drawing download