Heavy-duty classification folders feature a 2" expandable, Tyvek-reinforced tape gusset for added durability. Each folder is made of 25 point Pressboard stock and each divider is made of 17 point Kraft stock. Each divider offers 1" capacity, metal-prong fasteners. The front and back covers of the folder also have 1" prong fasteners. Outside cover and Kraft dividers are made of 30 percent post-consumer material. Classification folders meet Executive Orders 13514 and 13423.