Cardboard postal tube is buy in the United Kingdom
Cardboard Shipping Tube | Banner Shipping Tube
Poster Tube: Principle, Types, Applications, and Benefits
IMPRINT Cardboard Mailing Tube Pack of 4, Ideal for Shipping, Art and Craft, DIY, Packing 10 Inch Long and 2 Inch Diameter(Without lids) : Amazon.in: Office Products
Mailing Tubes – Pathe Shipping
Amazon.com : Lincia 24 Pcs Kraft Mailing Tubes with Caps Kraft Cardboard Tubes Shipping Tubes Poster Tubes for Mailing, Storing and Protecting Documents, Blueprints, Art, Drawings, Posters (2 x 12 Inch) : Office Products
Amazon.com : Juvale 12 Pack Mailing Tubes with Caps, 2x16 Inch Kraft Paper Round Cardboard Mailers for Shipping Posters, Art Prints, Maps, Blueprint (Brown) : Office Products
Mailing Tubes Come in a Variety of Sizes - Instabox, Canada
32 - 2" x 15" Round Cardboard Shipping Mailing Tubes With End Caps – supplyhut.com
Long Cardboard Poster Tubes for Mailing Postal Tube with Caps Storage Packaging for Document Blueprints Art Roll Shipping - AliExpress
Mailing Tubes with Caps - Premium Kraft Cardboard Tubes for mailing - Shipping Tubes for posters - Size 2" x 24" (Bundle of 5) - Walmart.com
50 2" x 18" Cardboard Shipping Mailing Tube Tubes Cores With End Caps | eBay