Top quality headset for use with MTB or Road bikes in size 1 1/8" Description & Materials - For 1-1/8" threadless steerer- 6061/T6 CNC machined top cover with seals- 6061/T6 forged and cne machined cups- 7075/T6 CNC machined crown race- Angular contact sealed bearings- Height: 29 1mm- Size: 1"-1/8 Threadless Headset- Dimension: 1-1/8"x34x30- ACB Sealed- Bearing: NHB-6B (OD 41.8×45×45)- Stack Height: 16.6+12.4=29mm 1mm- For 1"-1/8 steerer fork - For head tube ID: 34mm- Weight: 123g (include Alloy top cap) - Color: Black (as pic. shown)- Made in TAIWANContent: 1 set (With top cap and starnut) / pack