Bones Swiss Ceramics are lighter than steel and more resistant to dirt, heat, friction, and moisture. They come lubricated with Bones Speed Cream™ to reduce friction and protect against corrosion. This means you’ll experience better acceleration, more top-end speed, longer rolls and longer life. Each set of Bones ceramic longboard bearings has a nylon ball retainer to increase their strength. If and when debris gets into your bearings, they are easy to clean thanks to the removable rubber shield. Everything about these engineered bearings for longboards is Skate Rated™, which beats any ABEC rating for performance and durability. So use the best bearings on your longboard — you’ll feel it in your Bones! Accelerate faster Roll faster and farther Resist dirt and moisture better Help to repair injuries to your races caused by dirt 1 non-contact, removable rubber shields allow easy cleaning High speed Nylon ball retainer for greater strength and speed Skate Rated clearances, tolerances, materials and lubricant provide the best performance and durability possible. Set of 8 Bearings