Check the listing for details. Wolf Tooth Specialized IS42 Headset | Premium Enduro Bearings & 3mm Stack. Color: Black, Condition: New. Listed at 64.95 USD. Wolf Tooth headsets are machined here in our Minnesota shop with aircraft-grade 6061-T6 aluminum. They are designed to be lightweight, strong, and durable. Our headsets have three levels of industry-leading custom sealing to protect bearings from the elements and prolong the life of the headset. This has a stack height of 3mm and is available in a variety of colors to match other Wolf Tooth anodized color options. These IS headsets are made exclusively for Specialized frames with molded-in internal bearing cups. Like all Wolf Tooth Premium Headsets with Enduro stainless steel bearings, the Premium IS Headset for Specialized has a lifetime warranty on the bearings. . Compatibility Uppers and lowers sold separately. Enduro stainless steel sealed bearings included on both the upper and lower.