1.Diameter:100-400mm 2.Hole:70mm or upon request 3.Diamond grit:40# 60# 80#,as request 4.suitable for cutting and grinding various hard materials, such as marble, granite, glass, ceramic, concrete and brick. 5.smooth cutting surface, fast grinding speed, high efficiency. 6.If you have special requirements. we also can do as your requirements. ating:nickel, chrome, titanium available