Made of 3-ply spiral-wound fiberboard, Round Tubes protect photos, artwork and paper documents against folds, creases and tears. Also functional for parts and other supplies. Suitable for shipping and for storage of items. Each tube includes two snug-fitting plastic end plugs. Tube diameter and length are inside dimensions. In determining the length, allow an extra inch on each end to leave space for the end plugs and to protect the edges of your contents. Optional end closures include metal caps and Snap-Seal Tubes. A custom Item, see Quote Request Form. Also see, Round Tubes (White) and Round Tubes (Colors).