1Pc 15x26x7,15x24x5,12x28x8,15x32x9 Hybrid Ceramic Ball Bearing Double Sealed Si3N4 for Bicycle Bottom Bracket & Cycling Spares

1Pc 15x26x7,15x24x5,12x28x8,15x32x9 Hybrid Ceramic Ball Bearing Double Sealed Si3N4 for Bicycle Bottom Bracket & Cycling Spares

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