Durable fastener file folders designed for repeated use in your offices We understand in an office environment you need durable folders that can take years of abuse in a busy office, so we designed a product that can do just that. ● Heavy duty 25pt blue pressboard and 17pt kraft paper dividers ● Tear-resistant 2 inch Tyvek expansion for those extra bulky files ● Durable metal prong fasteners that are built to last Color coding your files made easy Easily identifiable, our dark blue classification folders are the perfect addition to any color coded filing system, and as a bonus, the elegant color will compliment any office environment.