ITEM NAME:Bike Bearing Headset, Aluminum Alloy Bicycle Tapered Stack Headset 1 1/8inch Description: Made of aluminum alloy material,lightweight and durable. For 1 1/2"/40mm tapered tube fork, for 1-1/8"/28.6mm straight tube Headset top cap to sit atop your threadless stem and add a bit of style to your bike. Sealed cartridge bearings. Universal headset cap for MTB mountain road bike bicycle. Specification: Material:Aluminium Alloy Stack Height: 5cm/1.97inch Size: 1-1/8",1-1/2" Cartridge Bearing Diameter:44/28.6+52/40(mm) Package Includes: 1 Piece Bicycle Headset Note: Please allow slightly difference due to manual measurement. Color may be slightly different since different monitors. Thanks! SKU: DMO0013500754033349.1 Piece Bicycle Headset. For 1 1/2"/40mm tapered tube fork, for 1-1/8"/28.6mm straight tube. Material:Aluminium Alloy. Headset top cap to sit atop your threadless stem and add a bit of style to your bike.