Amazon.com : US Art Supply Large Black Telescoping Drafting Tube: Diameter: 4-7/8 inch OD, 4-1/2" ID, Length: 30-1/4 to 47-3/4 inches : Arts, Crafts & Sewing
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Amazon.com : U.S. Art Supply Extra Large Jumbo Black Telescoping Drafting Tube - Outside Diameter: 10-1/2 inch, Inside Diameter: 9-3/4 inch, Length: 36 to 62-1/2 inches : Office Products
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