Including 10pcs of each in grit 400, 600, 800, 1000, 1500, 2000, 3000, total 70pcs, the smaller the grit number is, the coarser it is, the larger the grit number is, the finer it is. Our sanding discs has increased grit and each disc is marked with grit on the back, easy fo distinguish coarseness.
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