3 x 3 x 18" Square Mailing Tubes, Kraft, 25 / Bundle

Square shipping tubes stay in place and prevent rolling during packing and shipping. 

• One-piece design ship flat and save warehouse space.
• Tubes fold together fast with locking tabs.
• No glue or tape required for assembly.
• Constructed from ECT-32-B corrugated material. 
• Recommended for posters, prints, blueprints and design plans.
• Sold in bundle quantities.