Wolf Tooth Premium Headset - ZS44/28.6 Upper 6mm Stack Red MFPN=TC9645 }Instinct E is the supertough

}Instinct E is the supertough 40 mm smartwatch that gets up to 14 days of battery life

4mm Stem Length 110mm Stem Material Aluminum

Carbon infused shell ensures low weight and durability

} Aluminum thru axle with quick release lever

Wolf Tooth Premium Headset - ZS44/28.6 Upper 6mm Stack Red MFPN=TC9645 }Instinct E is the supertoughWolf Tooth Premium Headset ZS44 28. 6 Upper 6mm Stack Red. Wolf Tooth Premium headsets are machined out of aircraft grade aluminum and feature high end bearings made by Enduro. They are engineered to use the largest possible ball size and are filled with high pressure waterproof lubricant. A pair of dual lip seals ride in micro grooves to keep out water and debris. Stainless Steel Bearings provide unparalleled corrosion resistance Highly recommended