18 popular sizes (inner-ø x outer-ø x thickness): 40 pcs. 6x10x1.0 mm, 40 pcs. 6x12x1.0 mm, 40 pcs. 8x12x1.0 mm, 40 pcs. 8x14x1.0 mm, 40 pcs. 10x14x1.0 mm, 40 pcs. 10x16x1.0 mm, 20 pcs. 12x16x1.5 mm, 20 pcs. 12x18x1.5 mm, 20 pcs. 14x18x1.5 mm, 20 pcs. 14x20x1.5 mm, 20 pcs. 16x20x1.5 mm, 20 pcs. 16x22x1.5 mm, 20 pcs. 18x22x1.5 mm, 20 pcs. 18x24x1.5 mm, 20 pcs. 20x26x1.5 mm, 10 pcs. 22x27x1.5 mm, 10 pcs. 22x29x1.5 mm, 10 pcs. 24x29x2.0 mm