●✅30 Pack 9" sanding discs assortment - 5 of each type: 60 / 100 / 150 / 180 / 240 / 400 Grits. ●✅Pressure sensitive adhesive(PSA) backed and fit for most 9 Inch sanding machine. ●✅Aluminium oxide abrasive and C-weight paper, abrasion resistance and anti-static for optimal sanding capacity. ●✅Resin on resin bond for heat resistance. ●✅Applicable in furniture,automobiles,yachts,woodworking and other metal and non-metallic industries spheres to grind various complex surface rust, paint,burrs and solder joint.