Materials: Abrasives: aluminium oxide or silicon carbide Bond:resin over resin Paper: C ,D,E-weight Cloth:J,X,Y-weight Application: It is fixed on hard tools.Grinding and polishing for paint,wood,and piastic. 粒度Grits:24-36-40-60-80-100-120-150-180-220-240-280-320-400 圆形Discs,长方形Stripes