Full-integrated headset- For 1-1/8" threadless steerer- Headtube OD. = 45 to 46mm- Carbon fiber top cover with seals- 7075/T6 cnc machined crown race- Angular contact sealed bearings- Size: 1-1/8 Integrated Headset- ACB Sealed- Bearing: NHB-5D (OD41x36x45)- Stack Height: 9.4 0.9=10.3mm 1mm- Weight: 77g (include Alloy top cap) - Color: Black (as pic. shown)- Made in TAIWANContent: 1 set (With top cap and starnut) / pack