PI-1:~ The PI-1 Alloy 45_45 headset has an aluminum top cap, upper bearing cover, lower race and upper and lower cups. All-aluminum construction results in a lightweight headset. Each headset is fitted with super-smooth rolling, precision, 45_45 angular-contact sealed bearings.
• Because this versatile headset has 45_45 angular-contact bearings, you can use the included cups and install it in standard frames
• Available in anodized red, blue, gold and black, in 1Ó and 1 1/8Ó sizes
• Weight: 120g