Product details:

Standard - Diameter: 15/32 inch / .46875InchesMetricDiameter: 11.9062mm - Grade: 25Material: AISI 52100 Chromium Steel - Ball Weight (each): .24325Ounces / 6.896Grams - Chrome steel balls offer the precise geometry and fine surface finish that makes them especially useful for bicycles, casters, drawer slides, door locks and many other applications.