10-Pack 20mm Loose Ceramic Balls G20 ZrO2 Bearing Balls

10 Loose Ceramic Balls 20mm G20 ZRO2, this is a popular size that could be used in many Bicycle, or any application that uses this size 20mm. Balls are made from high-strength Ceramic ZRO2.

• ルーズボール
• Ceramic Balls
• Material: Zirconia （ZrO2）（二酸化ジルコニウム）
• Size: 20mm
• Quantity: 10 Ball Bearings