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The Mailing Tubes with Caps for A3 A4 Size Paper are specialized packaging solutions designed to ensure secure transport of important documents, artwork, and prints. Crafted from kraft paper (3–6 mm thickness) with a high-density fiber structure that resists crushing, these tubes feature a 66 mm inner diameter and 385 mm length—precision-engineered to perfectly fit A3 (297x420mm) and A4 (210x297mm) papers without bending or wrinkling. The snap-fit caps—available in water-resistant PE or heavy-duty MDF—create a dust-proof and moisture-resistant seal that preserves document integrity during transit. FSC-certified and fully recyclable, they replace plastic and metal tubes in business, education, and creative industries, reducing material costs by 25% while eliminating plastic waste.
Material: Recycled kraft paper (3–6 mm thickness, 40% post-consumer recycled content) with FSC certification
Inner Diameter: 66 mm (standard for A3/A4 document compatibility)
Length: 385 mm (customizable in 10 mm increments, from 250 mm to 600 mm)
Cap Materials: PE (water-resistant, food-grade) or MDF (moisture-resistant coating option)
Certifications: BPI-compliant for industrial compostability, FSC chain-of-custody certification, ISO 9001 quality certified
Weight Capacity: 5 kg (static load for storage), 3 kg (dynamic load for transportation); 10 kg for 6 mm reinforced tubes
Printing: Full-color offset printing with UV coating (scratch-resistant) for logos or tracking information
Impact Resistance: Withstands 500+ drops from 1m height without structural damage
Document-Specific Design
The 66 mm diameter ensures a snug fit for rolled A3/A4 papers, minimizing internal movement by 95% during transit and eliminating edge damage. The tube’s interior is smooth, preventing paper snags or tears.
Secure Closure
Snap-fit caps create an airtight seal that blocks dust, moisture, and pests, with a locking mechanism that requires 5 lbs of force to open—preventing accidental opening while remaining user-friendly.
Eco-Friendly Construction
Made from recycled materials and fully recyclable, it reduces plastic waste by 90% compared to plastic tubes. The production process uses 60% less energy than plastic manufacturing and generates zero toxic byproducts.
Customizable Branding
Print logos, company contact information, or tracking numbers on the exterior for professional branding. Optional sequential numbering aids in inventory management for high-volume shipping.
Business: Ship contracts, legal documents, financial reports, and presentation materials securely to clients or partners.
Education: Transport academic papers, research posters, and student artwork between campuses or conferences.
Photography: Protect rolled prints, canvas art, and photo enlargements during delivery to clients or galleries.
Government: Secure official documents, maps, architectural plans, and blueprints during inter-departmental transfers.
Q: Are these tubes suitable for international shipping?
A: Yes. They comply with USPS, Royal Mail, and China Post regulations for cylindrical packages, with dimensions that avoid oversized shipping surcharges.
Q: Can the caps be reused?
A: Yes. PE caps can be reused up to 10 times with proper care, while MDF caps offer long-term durability for repeated use in storage or shipping applications.
Q: Do you offer reinforced versions?
A: Yes. 6 mm wall thickness (vs. standard 3 mm) provides 40% more protection, supporting weights up to 10 kg—ideal for heavy documents or multiple paper rolls.
Q: What is the maximum weight capacity?
A: Standard 3 mm tubes support 5 kg (static) and 3 kg (dynamic). Reinforced 6 mm tubes handle 10 kg (static) and 7 kg (dynamic), suitable for bulk documents.
