Architube.net LLC 26-00004 25-1/2-Inch Drawing Tube with 3-Inch Diameter, Gray Convenient for storing, transporting, and protecting valuable drawings, maps and posters Pvc is durable and can endure harsh weather and can withstand wear and tear for many years Unique colors that appeal to different styles Perfect for 24 by 36 plans, an industry standard for architects and builders, also perfectly sized to fit a standard poster The lightweight tube combined with a wide shoulder strap make transport very convenient