12mm Loose Ceramic Balls G5 Si3N4 Bearing BallsLoose Ball Bearing 12mm = 31 64" Inch Ceramic Balls (Si3N4) One Ball Loose Ceramic Balls 12mm Si3N4, this is a popular size that could be used in many Bicycle, Balls are made from high strength Ceramic Si3N4. Loose Balls Size: 12mm (31 64" Inch) Material: Ceramic (Si3N4) Quantity: One Balls VXB Category: Loose Ceramic Balls
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