StoreSMART Red Plastic Archival Folders 5-pack - Letter-Size Twin Pocket - (R900R5) Made from tough archival poly plastic. Design features reinforced edges and built-in stress guards" to prevent tearing. Stain-resistant--ink doesn't transfer to the folder. Interior left pocket includes a business card holder. Outside pocket dimensions: 8 1/2" x 11", crystal clear. Inside pocket dimensions: 4 1/2" crystal clear pockets on both sides. Interior folder capacity: Holds 70 sheets per side. Made from archival poly plastic. Design features reinforced edges and built-in &#034;stress guards&#034; to prevent tearing. Stain-resistantink doesn&#039;t transfer to the folder. The virtually unbreakable spine is great for heavy-duty long-term use. Perfect for color-coded classification. Vivid colors help you stay organized. Ideal for classroom, medical, and business environments.