Precision meets reliability with the SPI Rectangle Steel Gage Block (0.14", Grade AS-1). This high-quality dimensional measurement tool comes complete with NIST Certification, ensuring accuracy for your most critical calibration and inspection tasks. Manufactured by MSC Industrial under the trusted SPI brand, this rectangular steel gage block (Part #15-054-0) provides the consistent measurements needed for quality control processes. The durable steel construction offers excellent wear resistance and dimensional stability over time. Perfect for industrial applications, machine shops, and quality assurance departments where precise measurements are essential. This calibration tool helps maintain measurement standards and ensures your equipment performs to specification. The included NIST certification documents traceability to national measurement standards for complete confidence in your dimensional verification processes.