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High-quality materials: aluminium alloy material, corrosion resistant, strong and not easy to damage, durable Fine workmanship: high strength and long service life. Easy installation: bike taper headset, easy to install and easy to use Easy installation: professional manufacturing, direct replacement of old or damaged age. Purpose: Great bicycle accessories, long service life; Product description Features: High-quality materials: aluminum alloy material, corrosion resistant, strong and not easy to damage, durable Good quality: good workmanship, high strength and long service life. Easy installation: bicycle headphones, easy to install and easy to use Stable performance: professional manufacturing, direct replacement of old or damaged age. Purpose: great bike accessory, long service life Specification: Item Type:Bicycle Headset Condition: 100% brand new. Material: aluminium alloy. Weight: approx. 136 g Color:As picture show Bicycle Headset Z-TTO 4456ST Z-TTO code: upper shell/bearing outer diameter + lower shell/bearing outer diameter + fork tube (\; Product description Features: High-quality materials: aluminum alloy material, corrosion resistant, strong and not easy to damage, durable Good quality: good workmanship, high strength and long service life. Easy installation: bicycle headphones, easy to install and easy to use Stable performance: professional manufacturing, direct replacement of old or damaged age. Purpose: great bike accessory, long service life Specification: Item Type:Bicycle Headset Condition: 100% brand new. Material: aluminium alloy. Weight: approx. 136 g Color:As picture show Bicycle Headset Z-TTO 4456ST Z-TTO code: upper shell/bearing outer diameter + lower shell/bearing outer diameter + fork tube (\; Features: High-quality materials: aluminum alloy material, corrosion resistant, strong and not easy to damage, durable Good quality: good workmanship, high strength and long service life. Easy installation: bicycle headphones, easy to install and easy to use Stable performance: professional manufacturing, direct replacement of old or damaged age. Purpose: great bike accessory, long service life Specification: Item Type:Bicycle Headset Condition: 100% brand new. Material: aluminium alloy. Weight: approx. 136 g Color:As picture show Bicycle Headset Z-TTO 4456ST Z-TTO code: upper shell/bearing outer diameter + lower shell/bearing outer diameter + fork tube (\