2000 x 3000 x 300mm granite calibration plate

Granite Calibration Plate With Size 2000 x 3000 x 300 mm The hardness and stability allow accuracies within millionths of an inch. Along with the high accuracies, granite is rust-proof, non-magnetic, abrasive resistant, non wedging, wrap-resistant and easily cleaned. The granite used for surface plates has an excellent distribution of hard quartz which provides a smooth, long-wearing working surface. Granite surface plates......