Material: alumina.Grit: 40#, 60#, 80#, 100#, 120#, 150#, 180#, 240#, 320#, 400#, 600#, 800#, 1000#(optional)Size: 25 * 330mm / 1.0 * 13.0in (optional)Made of fine quality material, easy to install and operate,With the use of various types of belt drive for efficient grinding,Suitable for all kinds of wood, furniture, metal and non-metal grinding and polishing.Widely used in metallurgy, machinery, shipbuilding, light industry, leather, wood, building materials, textile and other industries.60 mesh to 150 mesh: Grit series is used to polish hard, rough, rough and other things such as metal, wood, wall, etc.180 mesh to 320 mesh: commonly used for secondary polishing, some less demanding can be directly polished400 mesh ~ 600 mesh: Fine polishing, mainly for red furniture, amber bodhi, etc.Package Contents:10*Sanding belts,(Abrasive belt only)Reminder: Sanding Belt only, other accessories demo in the picture is not included,thanks.Note:1.Please allow 1-3cm differences due to manual measurement.2. Due to the difference between different monitors, please understand that the picture may not reflect the actual color of the item.