These 5 x 5 x 37 inch white square mailing tubes are built from ECT-32-B white corrugated board, delivering a rigid, crush-resistant enclosure for elongated items. The square profile prevents rolling during transit and handling, making these tubes more stable and stackable than round tube alternatives.

The fold-flat, one-piece construction requires no tape, glue, or additional tools to assemble, which reduces setup time in high-volume packing environments. Posters, architectural drawings, banners, textile rolls, and rod-shaped products all fit cleanly within the 37-inch interior length — making these tubes practical for print shops, apparel distributors, and trade show suppliers.

Each tube weighs approximately 0.74 lbs and ships via parcel carrier. Tubes arrive flat, conserving storage space until needed. Each bundle contains 25 tubes.