Nozlen Expandable Document Storage Tube 3" Diameter, Telescopes From 28" up to 49". Large Black Plastic Tube for Documents, Drawings, Artwork, Blueprints Posters, Model Dt5001 3" Inside Diameter, Expands from 28" - 49", Set Length At Any Desired Length Light Weight, Water Resistant, Light Resistant Expanding Shoulder Strap Screw on End Cap that is Attached to Document Storage Tube FREE SHIPPING when you Buy Two!