Marble platform flat plate is a benchmark measuring tool made of stone material, which is an ideal reference surface for the inspection of instruments, precision tools, and mechanical parts, especially for high-precision measurement. Derived from underground rock layers, after aging, the shape is stable and there is no need to worry about deformation due to conventional temperature differences. Granite platform plates (granite platform plates, marble platform plates, marble measurement platforms) are made of granite materials that have undergone strict physical testing and selection. The crystals are fine and the texture is hard. Due to its non-metallic nature, marble has no magnetic reaction and no plastic deformation. Its hardness is high, therefore it has good accuracy retention.