Cane Creek’s 40-Series sets the standard for performance, durability and value. Drawing from the premium 110-Series design, the 40-Series includes all the features necessary for a durable, lightweight, long-lasting headset.Consistent graphics, interchangeable parts and over 40 configurations to meet almost every size need. Sold in straight and tapered assemblies or tops & bottoms, tops are available in either short (9mm) or tall (15mm) stack height bearing covers. Precision engineered by Cane Creek in Fletcher, NC.Attributes Bearing Grade Sealed cartridge Crown Race Diameter 40mm Headset Position Lower Headset Type External, Threadless Lower Cup 44mm Material Aluminum Primary Color Black S.H.I.S. EC44/40 Stack Height 12 Steerer Tube 1-1/2''