Detailed Product Description 1- Abrasives: A/O, S/C,GC,WA;2- Grit: 150,180,240,320,400,3- Diameter: 75,100,115,125,150mm,4- Hardness:3P,5P,7P,9P,12P5- Thickness:8,10,15,20mm6- Quaqlity nylon non-woven fiber7- Glue-quality domestic glue or imported glue with perfect adhesive result8- Backing: re-enforced ABS plastic or 9 layers fiber glass