MATERIAL:High Quality Environmental friendly Polyurethane Replacement Wheels for Suitcase,Roller Skate,Caster Board, Scooter, capable of fitting a 80mm wheel. Quiet Running ,Anti-abrasive, Absorbs ShockThe material is made of high-quality PU, and the is upgraded to carbon steel, which is more durable. The height difference between the shafts of the bearings is 1mm, and it is more flexible to a size.SIZE:Replacement Wheel OD:80mm,Wheel Wide: 24mm, ID:6mmBearing Depth:24mmEASY TO INSTALL:to Remove The Wheel with A Hacksaw At The Space, Then Install The New Wheel with The Repair Kit.size: 80 x 24mmMaterial: PU+carbon steelcolour: blackPackage Contents:1 Pair x Suitcase Replacement Wheels4 x 4 x 2 x Wrenches2 x RivetsOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.