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Support For Granite Surface Plate. A class. Stand are provided with recessed or angle steel, welcome inquiry. Support For Granite Surface Plate. Our granite measuring devices and granite mechanical components are made of high qualityJinan Blackgranite.Due to their high precision,long duration,good stability and corrosion resistance,they have been more and more used in product inspection of modern industy and such scientific areas as mechanicalaerospace and scientific researches. Physical Property ofJi Nan BlackGranite: Specific Gravity: 2970-3070kg/m3 Compressive Strength: 245-254Mpa Elastic Modulus: 30-50Gpa Linear Expansion Coefficient: 4.61x10-6/0C Water Absorptivity: ≤0.07 Shore Hardness: Above 70Hs The "GOLD STONE"brand of granite measuring tools have the following characteristics: 1 High precisionreliable stability resistant to deform and guaranteed accuracy under normal ambient temperature. 2 No-rust and anticorrosion. 3 Wear resistance long service life. 4 Any cutting or scraching for working surface does not bring about roughedgeswhich mightinfluence its measuring precision. 5 Non magnetization. 6 Glossy surface without sluggishness when the workpieces or tools are moving on it. These are available with 3 suport points,with 4 extra small support screws.Exist in all dimensions for surface plates from 600x450mm up to 6000x3000mm support