Includes: (everything you need to replace your wheel & pulley bearings)Exway Wave, Exway Flex, Exway X1 Pro, Exway X1 Max:- Eight ceramic wheel bearings (Size: 608RS)- Four ceramic pulley bearings (Size: x2 6901RS and x2 6902RS) Exway Atlas 2WD Street Set-Up:- Eight ceramic wheel bearings (Size: 608RS)- Four ceramic pulley bearings (Size: x2 6901RS and x2 6902RS) Exway Atlas 4WD Street Set-Up:- Eight ceramic wheel bearings (Size: 608RS)- Eight ceramic pulley bearings (Size: x4 6901RS and x4 6902RS) Exway Atlas 2WD All Terrain Set-Up:- Eight ceramic wheel bearings (Size: 608RS)- Four ceramic pulley bearings (Size: x2 6901RS and x2 6202RS) Exway Atlas 4WD All Terrain Set-Up:- Eight ceramic wheel bearings (Size: 608RS)- Eight ceramic pulley bearings (Size: x4 6901RS and x4 6202RS) Exway Atlas Pro 2WD Street Set-Up:- Eight ceramic wheel bearings (Size: 608RS)- Four ceramic pulley bearings (Size: x2 6901RS and x2 6902RS) Exway Atlas Pro 4WD Street Set-Up:- Eight ceramic wheel bearings (Size: 608RS)- Eight ceramic pulley bearings (Size: x4 6901RS and x4 6902RS) Exway Atlas Pro 2WD All Terrain Set-Up:- Eight ceramic wheel bearings (Size: 608RS)- Four ceramic pulley bearings (Size: x2 6901RS and x2 6002RS) Exway Atlas Pro 4WD All Terrain Set-Up:- Eight ceramic wheel bearings (Size: 608RS)- Eight ceramic pulley bearings (Size: x4 6901RS and x4 6002RS) Our Exway Ceramic Bearings allow you to roll further, coast longer, and in some cases give you a little boost in range. This is due to the many advantages that ceramic bearings offer compared to a standard metal bearing. Ceramic bearings weigh less than a metal bearing, thus creating less rolling resistance. They also will not rust, thus signficantly increasing the durability and longevity of your board's bearings! Ride the best. Ride HyperDrive.