What you get: 8 pcs 608-2RS ceramic ball bearing in a steel box.Made of high quality carbon-steel with long durability with heavy load and strong resistance for daily use impacts. Standard solid bearing: All size in standard 22*8*7mm, black chrome shell never fray or stain. Pre-lubricant ceramic ball can run more smooth and longer than ordinary steel ball bearings. Nylon ball base can suffer more bump or fall. Smart design for strong bearing: Double rubber shield cover, resist outside impact, prevent dust or sand and stone from breaking into bearing, damage ball inside. ABEC-11 certification made it better than any other competitors you ever seen. Multifunctional use: Not only this set of ceramic 608 2RS bearing for skateboard, it can apply widely on sports like kick scooter and so on, but also on your life: spinner, stroller, hand cart, truck dolly. It’s your best option when you want to have some bearings. Reminder: The bearings is made with slight lubricant oil, change bearings with gloves to prevent moist from your hand for better performance. Senston 8 Pieces High Speed Double Shielding Ceramic Skateboard Bearings 608 Rs Abec-11 for Skateboard, Trucks, Scooters, Wheels, Roller Skates