Adir 641 Telescoping Document Tube, Expands from 27" Up to 50" with a 3" Interior Diameter, Water and Light Resistant, Artwork Tube/Poster Tube/Drawings Tube, Black Water-resistant tube for all-weather document transportation Slender and compact, easily portable Adjustable locking positions with numerical marking Ideal for artists, designers, illustrators, calligraphers, scrap bookers and hobbyists Expanding range from 27" to 50"