Metric 3 mm Dia. +/-.0025 mm, 52100 Alloy Steel Balls, 200 Pcs $45.5 Brand Basic Metal/Alloy Type Steel Material Steel Country/Region of Manufacture United States Unit Quantity 200 Sphere Diameter 3,, condition New Metric 3 mm Dia. +/-.0025 mm, 52100 Alloy Steel Balls, 200 PcsDia. Tolerance +/- .0025 mmBearing QualityHard and wear resistantYield Strength 295K PSIC60 RockwellASTM A295 ’s;