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PT-1811H ZS42/28.6 | ZS42/30 1-1/8" Internal Headsets Ø28.6 * 42 * 30 Height: 15.9+ 3= 18.9mm Bearings: Semi-cartridge (5/32" * 25) Material: steel cups w/ alloy top cover 13mm Finish: EDBK PT-1811H Drawing download