We make belts from different materials to suit the application. Each backing material is available in a range of grit sizes. POPULAR TYPES OF BELTS TYPICAL MATERIAL Portable Belt Machines Xwt Cotton Cloth Portable File Machines Xwt Polyester Cloth Small Fixed Belt Grinders (Linishers) Xwt Cotton Cloth High Power Belt Grinders X or Ywt Polyester Cloth Long Pad Sander Belts Ewt Paper Wide Belt Sanders Ewt Paper