100 PCS 6mm 0.24 Inch 304 Stainless Steel Bearing Balls G100 Precision por | ago 9, 20265pcs 20mm Bearing Balls 304 Stainless Steel G100 Precision Balls，20mm/apr.0.79″ Precision Bearing Balls. Precision: G100(Tolerance: +/-0.005mm). Size：20mm solid steel round balls, precision bearing balls.