3 x 3 x 18" White Square Mailing Tubes

These 3 x 3 x 18 inch white square mailing tubes are constructed from ECT-32-B white corrugated board, delivering a rigid, lightweight enclosure for rolled and elongated items. The square profile is the defining differentiator: unlike round tubes, these won't roll off conveyor belts, packing benches, or sorting surfaces, keeping pack lines moving without interruption.

Architects, print shops, retailers, and e-commerce operations use these tubes to ship documents, blueprints, posters, banners, and fabric samples. The white exterior supports clean, professional presentation for direct-to-consumer shipments and retail distribution where appearance at delivery matters.

Each tube ships flat and assembles by folding — no tape, glue, or tools required — reducing storage footprint and cutting per-unit assembly time. At approximately 0.23 lbs per tube, they add minimal weight to outbound shipments. Sold in bundles of 25; order multiple bundles to maintain consistent pack line inventory.