Achieve precision measurements with the SPI Rectangle Steel Gage Block. This 0.7-inch Grade AS-1 gage block is manufactured to exacting standards, making it an essential tool for dimensional calibration and inspection tasks. Each block comes with NIST Certification, ensuring its accuracy and reliability for professional applications. The rectangular steel construction provides durability and dimensional stability over time, while the precision-ground surfaces allow for consistent measurements. Perfect for quality control departments, machine shops, and metrology labs where accurate dimensional references are critical. This gage block can be used individually or combined with others to create custom measurement standards. The SPI 15-080-5 is designed for professionals who demand the highest level of precision in their measurement tools.