... 2.Material:Ji Nan Black 3.A maximum of 6000x3500x600mm Black Granite Machinery ComponentsOurblack granite granite measuring devices and granite mechanical components are made ... Hardness Above 70HsThe "TAI GOLD STONE"brand of granite measuring tools have the following characteristics:1 High precision ... tools are moving on it.CNC Components made of granite,including base,column,beam and railway,with a ...