Bsc Preferred M3318 Square Corrugated Mailer Tubes 25-pack

Product Description

The BSC PREFERRED M3318 is a pack of 25 one-piece square corrugated mailer tubes designed for packing and shipping documents, prints, posters, and similar rolled or flat items. Unlike round mailing tubes, the square profile prevents rolling during handling and staging, which simplifies packing lines and storage. Each tube is constructed from 200/ECT-32-B white corrugated board and ships flat to conserve storage space. The one-piece design folds together quickly without tape or glue, reducing assembly time on the pack bench. Sold as a pack of 25 units.

These square mailer tubes are suited for shipping and fulfillment operations that need a reliable, no-roll alternative to standard round tubes. Typical applications include mailing architectural drawings, blueprints, artwork, fabric samples, and other items requiring a protective tubular container. The flat-ship format makes them practical for warehouses and mailrooms with limited shelf space. This product is equivalent to part number S-3623.

Key Features

• Square profile prevents rolling during packing, sorting, and transit
• One-piece construction folds together without tape or glue
• Ships flat to reduce storage footprint before assembly
• Constructed from 200/ECT-32-B white corrugated board for consistent crush resistance
• Pack of 25 tubes per unit of measure

Compatibility

Equivalent to part number S-3623. Designed as a drop-in alternative to standard square corrugated mailer tubes in that size and board-grade category.

Installation Notes

No tools required for assembly. Fold the flat blank along the pre-scored lines to form the tube shape before loading product. Store flat blanks in a dry environment to maintain board integrity and fold quality. Do not expose unassembled blanks to moisture prior to use.