Professional Durable Water Proof Cylinder Tube Document Case Made of durable water proof plastic that will protect important documents. Includes adjustable straps for easy carry. Perfect for professional like: Artist, Archtect, Designers, Military, and Engineers that use important documents This product is perfect in storing fishing rods, baseball bat, samurai, posters, blue prints, maps, documents, large photo prints, drawings, artwork, arrows, drum sticks, The maximum expansion of this product is 50"