Product Content：
CNC Headset
Material: AL6061 w / 7075 Alloy crown race
Spec: 1 1/8″ Upper / 1 1/2″ Bottom , Internal; Ø28.6*ID 44*ID56* Ø39.8
Height: 9.6+2.8=12.4mm
Bearings: Sealed AC Bearings (41*45�)(52*45�)
Finish: BK
Headtube : OD 50mm / ID44 mm
OD 62mm / ID56 mm
Weight: 100g/set