Wolf Tooth Components Premium Headset Description: 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. Features: Premium complete headset featuring high-quality American made machining Upper and lower cups feature O-ring seal and sealed bearings for prevention of water intrusion around steerer tube Ultralight stem cap top cover with 6 mm stack height integrated spacer plus an aluminum bolt and a star nut Lifetime warranty available from Wolf Tooth Components