While many bearing manufacturers offer you standard Cr-Mo or steel headsets for your carbon road bike, steel bike, or fully suspended mountain bike, we provide entry-level headset bearings that are made entirely from 440C stainless steel. They are always designed with the largest possible balls and double-lip seals in a micron groove for ultimate protection against water and the elements. They are filled 90% with a high-pressure grease seal, so you'll never have to guess whether there is grease inside. Dimensions: 34.1 x 46 x 7 (45 x 45°).