Bones Swiss Original Bearings feature a single, removable, non-contact rubber shield for easy cleaning and low friction, paired with a high-speed nylon ball retainer for added strength and speed. They're pre-lubricated with Speed Cream racing lubricant and Skate Rated, meaning the clearances, tolerances, materials, and lubricant are all tuned for the best performance and durability possible. A trusted choice among skaters for reliable, fast-rolling bearings, they're a dependable pickup for anyone looking to upgrade their setup. Available in Assorted colors, one size fits all standard skate wheels.