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PT-1811 ZS42/28.6 | ZS42/30 1-1/8" Internal Headsets Ø28.6 * 42 * 30 Height: 7.5+ 3= 10.5mm Weight: 88g Bearings: Semi-cartridge (5/32" * 25) Material: steel Finish: EDBK PT-1811 Drawing download