3 x 3 x 48" Kraft Square Mailing Tubes

These 3 x 3 x 48 inch kraft square mailing tubes are built from ECT-32-B corrugated board and assemble without tape, glue, or tools. The one-piece fold-up construction locks into a square cross-section that prevents rolling during packing, staging, and transit — a practical advantage over round tube formats when handling volume or stacking shipments.

The 48-inch length and 3-inch interior cross-section accommodate elongated items commonly shipped in manufacturing, distribution, retail, and e-commerce environments — including posters, blueprints, dowels, rods, and similarly shaped goods. The square profile also improves stackability on pallets and shelving during staging.

Each tube ships flat, keeping storage footprint minimal before use. At 0.556 lbs per unit, the lightweight construction helps manage parcel weight costs. Tubes are sold in bundles of 25 and ship via parcel carrier.