1.5in / 1-1/8in Steerer - 36 degrees/ 45 degrees ACB - For tapered 50mm /62mm OD headtube - For 1-1/8in to 1.5in tapered fork - Alloy top cap - Upper: forged alloy cup with Angular Contact Bearings - Lower: 1.5in CNC machined alloy cup with Angular Contact Bearings - Stack Height 9.9+2.9=12.8mm - OEM packing - Color: Black (as pic. shown) - Weight: 129g (includeing top cap and starnut)