Amazon.com: (2 Pack) White Expandable Poster Tube with Strap - Storage Tubes with Caps and Labels for Use as Document Tubes, and Blueprint Tube Holders - Poster Tube Carrier Expands from 24.75"
Amazon.com : Poster Tube with Strap Plastic Expanding Poster Tube 24.5" to 40" with Clear ID Card Cap Transport Tube Telescoping Carrying Case for Blueprints (Blue-Medium Size) : Arts, Crafts & Sewing
Clear Plastic Tubes - 3 x 36" S-11362 - Uline
Best Poster and Art Tubes for Storing and Transporting Works – ARTnews.com