World Champion ACER Racing 4x11x4mm Ceramic Ball Bearing.  This is a 4x11mm ceramic ball bearing also known as a size 694 ball bearing. Diamond polished Silicon Nitride (Si3N4) Balls, HSR cage technology and sealed on both sides. Lubricated with lightweight and 100% synthetic ACER Racing SIN Oil for super fast and super smooth action. PRICE IS FOR 2 PIECES AS SHOWN.

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