This SWORKz ball bearing set provides 5x12x4mm metric bearings as factory replacements for a range of RC vehicles. The metal-shielded construction helps keep debris out of the bearing races for smoother, longer-lasting operation. This set includes four bearings, making it a practical option for a full replacement job or keeping spares on hand. Features: 5x12x4mm metric dimensions Metal shields on both sides Set of four bearings Fits multiple popular RC platforms 7/7/26 cs