Precision meets reliability with the SPI 10 mm Diameter Chrome Steel Gage Ball. Manufactured to Grade 25 Accuracy standards, this dimensional measurement tool delivers consistent performance for your most demanding calibration and inspection tasks. The chrome steel construction ensures durability and dimensional stability over time, making it an essential component for quality control processes. With its perfect 10 mm diameter, this gage ball is ideal for calibrating measuring instruments, checking radius gauges, and performing various dimensional verification tasks. Part of SPI's trusted line of measurement tools, this gage ball (Part #14-820-5) is designed for professionals who require dependable accuracy in industrial measurement applications. An indispensable addition to any metrology lab or manufacturing facility's calibration toolkit.