Granite Vee Block, Brand Name : Willing

granite vee block granite parallels cast iron measuring tools description the granite v-block chiefly contains pyroxene, plagioclase, olivine, biotite and magnetite. It is black in appearance, precise in structure. granite v block specification willing is specialized in producing granite angle plate, granite surface plate stand，granite parallels, magnalium straight edge. Our products are very popular, if you are interested in our products, please contact us as soon as possible.