Hardness Tester, ISO 6506, ASTM E10, Scales HB, Measuring Range 16 to 650HBW, Resolution 3,000 kg, Magnification 20X, Indenter Ball, Work Surface Depth (In.) 3 35/64 in, Max. Workpiece Height (In.) 13 25/32 in, Features Measure Hardness of Aluminum, Aluminum Alloy, Fiber Reinforced Plastic, Hard Plastic, Includes Brinell Test Block, Flat Anvil, Measuring Microscope, Spherical Anvil, V-Type Anvil