Use economical kraft mailing tubes for document storage or mailing. • 3-ply spiral wound construction. • Strong construction protects blueprints, posters and artwork from damage during shipment. • Additional white plastic end caps available. Qty. Case: 24 Weight: 25 Material: 3-Ply Spiral Wound Construction Color: Kraft D x L: 3 x 48" Wall Thickness/Gauge: 0.08 GA.