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PT-1606 EC34/28.6 | EC34/30 1-1/8" , Threadless Headsets Ø28.6 * 34 *30 Height: 16.1+ 13.2= 29.3mm Weight: 137g Bearings: Semi-cartridge (5/32" * 22) Material: Steel Finish: EDBK PT-1606 Drawing download