World Champion ACER Racing 5x11x5mm Ceramic Ball Bearing.  This is a 5x11x5mm ceramic ball bearing also known as a size 685 ball bearing. Diamond polished Silicon Nitride (Si3N4) Balls, HSR cage technology and sealed on both sides. Lubricated with lightweight ACER Racing lube for super fast and super smooth action.   Can be used anywhere a 5x11x5mm bearing is required including in motors. Note: the width of this bearing is 5mm. We also sell a 4mm wide 5x11mm bearing in our eBay store.
ACER Racing lightweight ceramic ball bearings last longer and spin faster.
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