Abrasives:Aluminium Oxide Or silicon carbide
Bond:resin over resin
They can be washed by water they are dirty,and continue to be used
after drying.Being coated with abrasive materials on each side, both sides of the screens can be used.It is not only suitable for
sanding plaster and wall surface,but also for sanding rusty spots
of metal materials and making grinding and polishing treatment.