Universal expandable system lets you customize your wall filing system. Simply add pockets as your organization needs grow. Mounting hardware included. Plastic. Expand with add-on pockets, sold separately. Hanging file systems type: expandable multiple pockets; for file size: letter; overall height: 14″. larger quantity quotes available. Please call 1-888-978-7759. this product arrives to most customers in 2-3 business days.