Product Description Individual gauge blocks, also known as gauge slips, made from high quality Tungsten Carbide. Each gauge block is marked with a traceable serial number. Key Features - Tungsten Carbide material for highly increased durability and protection against machining workshop wear - Available in 4 grades: Grade K for Calibration, Grade 0 for Calibration, Grade 1 for Inspection, Grade 2 for workshop - High quality surface finish and high dimensional stability - Working surface hardness greater than 63HRC - Heat treated for high resistance to wear - Conforms to ISO standards for guaranteed accuracy and reliability Specification -Individual Imperial Tungsten Carbide Gauge Block -Size: 0.1009"; Grade 0 (Inspection Grade) ; Comply with Standard: BS EN ISO 3650