Auniwaig Sanding Discs 40 Grit Package Content: 20pcs x PSA Sanding Disc Specification: Grit Size:40-grits Type:PSA Disc Size: 6 inch Abrasive Material : Aluminum Oxide Description: 1.High Quantity Adhesive Back ：The adhesive of PSA sanding paper has strong stickiness,make sure it's not easy to fall off at work.Moreover, it is easy to clean up, and there is almost no residue after the sand paper is uncovered. Even if there is, the residue is very few;It can be easily removed by gently rubbing with rubber 2.Aluminum oxide grain delivers a fast and long lasting cut. 3.Open-coat produces an even and consistent scratch pattern. 4.Special stearate coating is used to maximize resistance to clogging and pilling;6 inch diameter, suitable for use with random orbit sanders. 5.Pre-punched with No- holes for uniform dust extraction. 6.PSA Self Stick makes grit changes quick and easy, and lengthens the life of the abrasive.