5DEV Titanium Headset Caps and Covers offer precision, strength, forever fit. CNC-machined from Ti-6Al-4V for ultra-high durability, corrosion resistance, and clean, low-stack integration. These 5DEV titanium caps and covers hold torque, stay true, and keep your cockpit quiet in any weather. Add grams where it matters least, gain decades of service, and finish your build with bike jewelry that rides as good as it looks. Fits bearings with an OD of 41.80mm or less 6.5mm Stack Height If using with Specialized Crux customers should transfer over that rubber insert if they are upgrading their plastic spacer to 5DEV&';s Ti spacer. CNC-machined titanium offers corrosion resistance for year-round riding Precision machining keep your headset tight, clean, and protected Designed for use with 1-1/8" steerer tubes Item Specifications Color Raw Titanium Material Titanium S.H.I.S. Stem Clamp Diameter 28.6 5DEV Titanium Headset Covers Headset Small Part UPC: 850076919436