Amazon.com : Premium Kraft Cardboard Mailing Tubes - 4" x 24" - 4" Opening Diameter 24" in Length - Case of 12 Shipping Tubes with White End Caps (4x24) for Art, Drawing,
Alvin Cardboard Mailing Tubes | BLICK Art Materials
Cardboard Shipping Tube, 3" x 37" x .375 Thickness - Silt Management Supplies, LLC.