Achieve precision measurements with this SPI Setting Ring featuring a 5-1/2" inner diameter, 7.87" outer diameter, and 0.78" thickness. Engineered with exceptional accuracy of 0.000160", this dimensional measurement tool is essential for calibrating measuring instruments and ensuring consistent quality control in machining operations. The bright finish provides excellent visibility and resistance to corrosion, extending the tool's durability in workshop environments. This setting ring serves as a reliable reference standard for checking internal measuring instruments like calipers and bore gauges. Manufactured by MSC Industrial under the trusted SPI brand, this high-precision calibration tool is designed for professionals who demand consistent accuracy in their dimensional measurements. Its solid construction ensures stability during use, making it an indispensable addition to any quality control department or precision machining facility.