C-Line, a leading manufacturer of office supplies with a product line that features storage, identification and organization products. Organize your letter size papers in style with this fashionable C-Line 13-Pocket Poly Expanding File. They are made of durable, archival quality polypropylene to last while transporting your documents. Each file also includes 12 write-on tabs, black stitched edges and button and elastic closure. C-Line Poly Expanding Files offer style and function in one, making them a great choice for your organizational needs.