Diameter 4 inch, Thickness 3/5 inch, Aperture 5/8 inch, Max Speed 13300 (R.P.M.); Abrasive grain size - Silicon Carbide 46# This poly strip disc wheel is made of silicon carbide abrasive combined with non-woven nylon fiber. When grinding at high speed, the strip disc wheel produces less and is less likely to burn the of the workpiece, avoiding damage to the workpiece It can be used for rust removal, paint removal, sealant removal, cleaning around weld, oxidation removal, etc. without damaging the of the object. The high strength nylon fiber allows the grinding disc to fit well, reduce the frequency of clogging, and provide excellent performance for grinding edges When grinding, if metal debris adheres to the grinding wheel, it affect the cutting force and reduce the grinding efficiency. Our paint removal grinding wheel are open mesh structure, when grinding, the debris pass through the fiber , which is not easy to block and has a long service life color: blue Material: Silicon Carbide