These kraft mailing tubes feature a 4 inch inside diameter and a 3-ply spiral wound paperboard construction with crimped ends that compress to close without tape, adhesive, or separate end caps. The pinch-seal design enables fast loading and closure in a single motion, eliminating the need for additional closure hardware.

The long, narrow format suits rolled materials including posters, blueprints, architectural drawings, banners, and presentation documents. Print shops, architecture firms, trade show suppliers, and fulfillment operations shipping oversized flat goods commonly rely on this tube size for both outbound shipping and internal storage.

The listed 36 inch length reflects usable interior space — the actual tube is slightly longer to accommodate the crimped ends. Kraft paperboard construction is reusable and recyclable. Each case contains 15 tubes and ships via parcel carrier.