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Umriox Zipper Mesh Document Pouch, 9.5x7.1 in 18pcs-A5 (9.5x7.1 in), Black
You will appreciate how the black exterior doesn't show dust as much as white does.
24 Pcs Mesh Zipper Pouch Bags, Plastic Pouches for Classroom in Clear
The clear look is great for those who prefer visual access.