This 3" x 3" x 18" square mailing tube opens along the top of the box containing secure self-locking tabs and end flaps--no tape, glue, staples or plastic end caps needed! Package items such as blueprints, artwork, calendars, posters, charts, maps or other irregular-shaped documents to reduce the need to use boxes that are too large for such items. This single wall 200#/ECT-32 mailer tube is excellent for protection against breakage, folding, or creasing. This square mailing tube is easily stackable, making this box an efficient shipment and storage method because it rests on flat surfaces. This corrugated square mailing tube has a Type B flute size and can withstand up to 65 lbs.

Key benefits:

  • Withstand 65 lbs.
  • Great for packaging irregular-shaped documents
  • Contains self-locking tabs and end flaps
  • Ships flat
  • Manufactured from 200#/ECT-32 single wall corrugated
  • Interested in custom printing? Give us a call at 630.629.6600 or email Sales@TheCaryCompany.com to learn more about custom inquiries
  • Proudly Made in the USA


Corrugated Cardboard is typically comprised of a fluted or zig-zag paperboard layer sandwiched between two stiff boxboard layers. Used in the manufacture of shipping cartons, corrugated material offers increased reinforcement to protect box contents from damage. Corrugated cardboard material is offered in single-face and single-wall configurations. For added strength, double- and triple-wall configurations are available. The fluted layer can also vary according to flute depth and number of flutes per foot.


This information has been provided as a general guide. It is the customer's responsibility to select the proper container for product and application compatibility. The Cary Company does hereby disclaim any and all warranties, expressed or implied, including any implied warranty of merchantability or fitness for a particular purpose or use. We are not responsible for consequential damages arising from customer's selection and use of containers, container and label dimensions, and/or closures supplied by us.

Additional Information

More Information
Content Weight65 lbs.
Box Strength200#/ECT-32
Wall ConstructionSingle Wall
Box TypeTall
Dimensions3" L x 3" W x 18" H
Case Pack25 ea.
Pallet Pack625 ea. (25 Cases)
Pallet Weight89.5 lbs.
Pallet Dimensions40" L x 48" W x 60" H
Weight0.1432 lbs.
Country of ManufactureUnited States
Q & A
Customer Questions
Can you ship internationally? Where are you located?
The Cary Company online ordering platform is only set up to ship within the United States. For international shipments, please contact us at 630.629.6600 or Sales@thecarycompany.com, and we will be happy to process your order. Our main warehouse and office are located in Addison, Ill. We also have warehouses in across the United States that you can see here. Thank you for choosing The Cary Company.
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