Description and materials - Atomz/UN internal headset suitable for all 1 1/8" internal head tubes. - Aluminium cups, available in black colour. - High quality sealed cartridge bearings, which ensure a smooth running. - Suitable for Monty 221 Ti, 221 Kamel, 231 Ti, 231 Kamel, Ozonys and all Atomz frames... - Supplied with top cap, star nut and bolt, ready to fit. Dimensions - Ø 1 1/8 - Internal headset Finishes - Anodised black - White laser etched UN logo Weight - 93g (+ bolt, top cap and star nut at 17g) Additional information: If you have any doubts, please contact us.