They are orange variations of this low-friction plastic bearings first sold in Item 15523, that really help make sure that your Mini 4WD automobile runs because next to maximum efficiency that you can.
• Low-Friction 620 Plastic Bearings x5
• Low-Friction 520 vinyl Bearings x2
• 620 size components are for use on hex shaft axles, while 520 size elements are for use in Mini 4WD PRO vehicle countertop gears.
• Compatible with Mini 4WD and Mini 4WD PRO automobiles.