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PT-1808S ZS44/28.6 | ZS44/30 1-1/8" Internal Headsets Ø28.6 * 44 * 30 Height: 9.6+ 2.9= 12.5mm Bearings: Sealed AC bearings 41 * 6.5 * 45° (R408) Material: AL6061 w/ steel crown race Finish: Anodized PT-1808S Drawing download