1)Resin 4'' floor grinding and polishing pad 2)Thickness:3mm 3)Grit 50,150,300,500,1000,2000,3000 4)High diamond ratio ... 4" resin bond floor grinding and polishing pad JS-001----- We supply premium ... , make job more effecient.7. Specially designed with large,raised segment for long life.8. Applications: griding for concrete, stone, marble,granite ...