Our 3- Prong Fastener Folders are made with Heavy Weight Durable Polypropylene material so they are Tear Proof and Water Resistant. The Stainless Steel Metal Fastener will hold up to 50 Letter sized sheets. Folder includes 2 large 5" high pockets on inside to store additional papers. Each pocket will hold up to 30 additional sheets for a total capacity of 110 sheets per folder. Also available in other colors.