C-Line"s Sheet Protectors are made from standard weight polypropylene, which means durable storage for documents and reference materials. Archival quality protection with polypropylene means no photocopy transfer. Top loading sheet protectors provide permanent storage for your materials. No hole punching is necessary, thereby keeping your documents in their original condition. Clear finish. 25 per pack. With over 60 years of experience, C-Line"s many product offerings include sheet protectors, name badges and holders, shop ticket holders, media storage products, laminating film, report covers and project folders, photo holders, Memory Book page protectors, office accessories, transparency film and more.