Aviditi M4437 Square Mailing Tubes, 4" x 4" x 37" (Pack of 50)
4" x 4" x 37" Square Mailing Tubes. Square tubes will not roll around which makes them easier to pack and ship than traditional round mailing tubes. These one piece tubes ship flat to save space. Tubes fold together fast without tape or glue. Constructed from 200#/ECT-32-B oyster white corrugated. Sold in bundle/bale quantities.