1.Aluminium Oxide 2.Good quality with resonable price 3.grits ... 4.For Wall, Metal, Wood, Marble, Stone,etc Sander Paper Aluminium OxideJZsander is short for Chongqing Jiazhuang Environmental Protection Tech. Co ... chosen below is for your reference16# , 36# , 40# , 40# , 80#, 120# these grits are used to sand outer walls, 180 ... , 100 pieces of one box.CartonImage Showcase: Sander Paper Aluminium Oxide