QUIX 81 Pc Rectangular Steel Gage Block Set Grade B (TM-17876), an epitome of precision and quality in the realm of measurement tools. Crafted from the most refined quality tool steel, each block boasts impeccable robustness and accuracy. This set comprises a diverse range of sizes, including the nominal sizes: 0.05, 0.10, 0.1001-0.1009 (9 Blocks), 0.101-0.109 (9 Blocks), 0.110-0.149 (40 Blocks), 0.15, 0.20, 0.35, and extending up to 4.000. Designed to cater to a wide spectrum of applications, from machine calibration to intricate laboratory experiments, this set suits both professionals and enthusiasts. A noteworthy feature is its adherence to the standard reference temperature of 20°C (68°F) with a coefficient of thermal expansion pegged at (11.5 ± 1.0) x 10^(-6)/°C. This indicates a low susceptibility to temperature-induced dimensional variations. Each block's surface hardness stands at HRC 64, designated as Grade B. Further, the set conforms or surpasses the Federal GGG-G-15C standards, reflecting its uncompromised quality. Every purchase is accompanied by a certificate of inspection, asserting its impeccable standard. All the blocks are neatly housed in a custom-fitted wooden case with sizes clearly marked, ensuring easy access and storage.