Check the listing for details. Wolf Tooth Premium Headset - ZS44/EC44, Olive. Condition: New. Listed at 119.90 USD. 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.Uppers and lowers sold together as a set. Enduro stainless steel sealed bearings and O-ring seals prevents water intrusion around steerer tube included on both the upper and lower system. Ultralight stem cap with integrated spacer plus an aluminum bolt and a star nut, 6 mm stack height top cover only. Lifetime warranty. Item Specifications: Color, Olive, Bearing Type, Cartridge, Crown Race, 40, Material, Alloy, Defined Color, Green, Upper Stack Height, 6, S.H.I.S Upper, ZS44, S.H.I.S. SHIPS TODAY! Order before 1:30PM EST, M - F, and this item ships the same day! HAVE A QUESTION?Expert customer service by bike experts! A Real Brick And Mortar Retail Bicycle Shop with people you can talk to! Contact Us! (9-5 Mon-Fri, 12-4 Sat & Sun EST) Chat With Us