Product Description

Adopting high quality "jinan Qing" natural material of granite,grnaite surface plate is manufacturered by mechanical processing and manual polishing.the main mineral ingredients of granite are pyroxene,anthorthose ,less olivine,black mica and less magnetite.Aging throught hundreds of millions years ,the granite can still retain even character,stable,high strength and hardness,and can keep high precision at heave duty .it is suitable for industrial production and measuring works at laboratory.