Descriptions:-Precision stainless steel balls are used when conditions require corrosion performance and toughness not available in hardenable stainless steels.-Stainless steel balls offer the precise geometry and fine surface finish that makes them especially useful in valve pumps, sprinkling systems, appliance components, casters, drawer slides, locking mechanisms, semi-precision bearings and a host of other industrial and consumer products.-Principal applications are in couplings, valves and pumps. Specification:Material: 304 Stainless steelPrecision: G100 (+/-0.005mm)Diameter: 1mmHardness: <26 HRC Package Includes:1000 x Bearing Balls