Bones Ceramic Super REDS® are lighter and provide faster acceleration because the balls weigh much less. They create less friction and are thus faster than Super REDS®, with or without lubricant! When you get dirt into your Ceramic Super REDS®, the ceramic balls will help to re-polish the steel races flat again, providing a self-healing benefit because ceramic balls are so much harder than steel. Finally, ceramic balls will not rust, further lengthening their life. Ceramic Super REDS® use a bone colored shield with laser-engraved outer races for identification. Features grade 5, silicone nitride, hot isostatically pressed ceramic balls. Higher quality steel races and a superior surface finish. Single non-contact removable rubber shield for easy cleaning and less friction. High speed nylon ball retainer for greater strength and speed. Pre-lubricated with Speed Cream racing lubricant. Skate Rated clearances, tolerances, materials and lubricant provide the best performance and durability possible. Contents Set of 8 bearings Instructions Sticker