Acurit Mailing Tubes For Shipping and Storage - [Black | Telescoping Tube Adjust Between Ranges 29" - 53" / 4.9" Diameter] For safely storing, shipping or carrying varied sizes of artwork, choose Acurit Telescoping Tubes!At your convenience, the height of these storage tubes can be quickly and easily adjusted. Acurit telescoping tubes are made of durable, industrial strength plastic and feature a twist-lock mechanism for a tight closure. Their black color also protects artwork from fading due to sun or lamp exposure. Acurit Telescoping tubes are durable for shipping and mailing your artwork or drafts. These archival tubes also include a strap for artists on the go! This tube size measures at 29" when retracted and expands to 53" (over four feet tall!).