Description: 100% brand new and high quality. Stem headset top cap cover, universal headset cap for MTB road bike bicycle. Headset top cap to sit atop your threadless stem and add a bit of style to your bike. Sealed cartridge bearings. Compatible with threadless 1 1/8" (28.6mm) steerer tubes. Specification: Material: Iron and Aluminium Stack Height: 52mm Size: 1-1/8" Head Stem-Build: external Cartridge Bearing Diameter:34/28.6-34/30(mm) Package Includes: 1 Piece Bike Threadless Headset