Precision meets durability with the SPI 5 mm Diameter Chrome Steel Gage Ball. Manufactured to Grade 25 Accuracy standards, this high-quality measurement tool is essential for calibration, layout, and machine setup applications. The chrome steel construction ensures exceptional hardness and wear resistance, making it ideal for repeated use in dimensional measurement tasks. With its perfect spherical form and consistent 5 mm diameter, this gage ball delivers reliable reference measurements for quality control processes. Part of SPI's trusted line of dimensional measurement tools, this gage ball provides the accuracy professionals demand for precise calibration work. Whether you're verifying equipment accuracy or performing complex measurement tasks, this chrome steel gage ball delivers consistent performance in industrial and laboratory settings.