1/8" Carbide Balls super precision from World Champions ACER Racing.  12 pieces per order. 

Each pack is matched to ensure consistent concentricity, roundness, and smoothness among the balls. Our tungsten carbide balls are so strong, they will not shatter or melt under even the most extreme conditions. Available in all sizes in our eBay store: 1/16", 3/32", 1/8", 5/32", 5/64", 2.0mm, 2.4mm, 3.0mm, 4.0mm

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