These 4 inch inside diameter kraft mailing tubes deliver exceptional rigidity through 0.125", 3-ply spiral wound wall construction. That build resists bending, crushing, and radial compression during transit and storage — making them a reliable choice where standard tubes fall short. End caps are included with each tube; the listed 36 inch length reflects usable interior space, as actual tube length is slightly longer to accommodate the caps.

Architects, engineers, print shops, and fulfillment operations rely on these tubes for shipping rolled documents, blueprints, large-format drawings, posters, and fabric samples. Their rigid walls maintain shape under the stacking and handling pressures common in warehouse environments and high-volume parcel shipping workflows.

Each case contains 12 tubes with caps and weighs approximately 18.6 lbs, making cases manageable for manual handling and efficient for pallet storage. Replacement 4" end caps are available separately for operations that repack or reuse tubes at scale. Ships via parcel carrier.