Moisture-proof bags, a set of 70 pieces by size. These are paper bags that can be used for packing powders, granules, pellets, and the like, such as cement. Sizes, from largest to smallest: 800 x 420: 20 sheets 700 x 360: 10 sheets 630 x 310: 20 sheets 500 x 245: 20 sheets As shown in image 4, there are some slightly dirty spots, but I think it's not a problem. Please ask any questions in the comments.