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The BSC PREFERRED ML28221 is a one-piece jumbo fold-over mailer designed for shipping and storing oversized flat items. Built from 200/ECT-32-B white corrugated board, it delivers reliable crush resistance and a clean presentation. The mailer opens completely flat for easy loading - place the item on the open mailer, fold the panel over, and seal with tape. No assembly required. Each pack contains 20 mailers, making it practical for operations that regularly move large flat goods. The corrugated construction meets ECT-32-B edge crush test standards, providing structural integrity for items that require flat protection during transit.
This mailer is suited for shipping portfolios, architectural drawings, blueprints, maps, posters, and similar oversized flat documents or materials. It is appropriate for both commercial shipping departments and individual use where standard mailers are too small. The one-piece fold-over design eliminates the need for additional packaging components and reduces pack time. At approximately 33 inches in length and 47.75 inches in width, the mailer accommodates large-format flat items that would otherwise require custom packaging solutions.
Equivalent to part number S-15021. Designed for oversized flat items including portfolios, maps, blueprints, posters, and similar large-format materials that require flat-profile mailer packaging.
No tools required for use. Place the item centered on the fully open mailer, fold the top panel over the item, and secure all edges with pressure-sensitive packaging tape. Ensure tape is applied to all seams for transit integrity. Store unused mailers flat in a dry location to prevent warping or moisture absorption.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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