ATOM 8pk Boom 59x38mm or 62x44mm Roller Derby and Speed Skate Quad Wheels with ABEC 7-8mm bearings and Bones Bearing Puller/Press & Devaskation Drawstring Bag 4 PC Bundle 8pk of Atom Boom wheels available in 59x38mm Firm or Xfirm SURFACES: Sport Court, Concrete, and Wood Floor Abec 7 - 8mm Bearings 16pk Roller Bones Puller/Press Bonus Devaskation Drawstring Bag