Precision meets reliability with the SPI 3 mm Diameter Chrome Steel Gage Ball. Manufactured to Grade 25 Accuracy standards, this high-quality dimensional measurement tool is essential for calibration, layout, and machine setup applications. The chrome steel construction ensures durability and consistent performance in various measurement scenarios. With its precise 3 mm diameter, this gage ball provides the accuracy needed for critical dimensional inspections and comparisons. Part #14-813-0 from SPI, a trusted name in measurement tools, delivers the exacting standards required by quality control professionals and machinists. Perfect for use in metrology labs, manufacturing facilities, and anywhere precise dimensional references are needed. This gage ball serves as an indispensable reference standard for your measurement system.