The specification of Inspection plate always between 100 × 100 and 3000 × 6000 (special specifications of the factory according to the demand side, drawing production)
Inspection plate  used to a variety of mechanical inspection, precision measurement of the reference plane; This product can also be used in machine tools mechanical testing benchmarks; check the dimensional accuracy of parts or geometric deviation, and as close crossed rock rectangular foot in the machinery manufacturing is also indispensable basic tool.

Test plate (cast iron test platform) have highly accuracy of the national standard verification procedures, can be divided into glass 1,glass 2,glass 3 and glass 4. Material selection of high-strength cast iron casting made HT200-300, face hardness HB170-240, widely used in various occasions.

Inspection cast iron plate (test platform)  can also be used to the surface quality  coloring test. Grade 0 and 1 plate on each side of not less than 25 points in the range of 25 mm square, Grade 2 less than 20 points, Grade 3 less than 12 points.