They are orange variants of the low-friction synthetic bearings first available in Item 15523, that help to make specific your Mini 4WD car runs since close to maximum efficiency that one may.
• Low-Friction 620 plastic Bearings x5
• Low-Friction 520 plastic Bearings x2
• 620 size components should be applied to hex shaft axles, while 520 size elements must certanly be utilized in Mini 4WD PRO automobile counter gears.
• appropriate Mini 4WD and Mini 4WD professional cars.