Box Packaging Inc SLE10131WE Expandable Envelopes 100 Pack

Product Description

The BOX PACKAGING INC SLE10131WE is a pack of 100 expandable poly-reinforced mailer envelopes designed for shipping books, documents, and other bulky flat items. Each envelope measures 10 inches wide by 13 inches long with a 1.5-inch gusset depth, providing enough volume to handle thicker contents without splitting. The shell is white paper reinforced with a mesh screen poly fiber construction, making it approximately six times stronger than standard paper envelopes. A built-in self-seal closure strips the need for additional tape on most shipments. These envelopes are also moisture resistant, offering a basic level of protection against surface contact with water during transit and handling.

These envelopes are suited for mailrooms, shipping departments, fulfillment operations, and service businesses that need a reliable poly-reinforced mailer in volume. The end-opening design and gusseted body accommodate catalogs, manuals, soft-cover books, and packaged trade supplies. The 100-count pack format is practical for high-turnover shipping environments where consistent mailer stock is critical. Facilities managers, shipping coordinators, and supply house operations are the primary users of this product type.

Key Features

• Poly mesh fiber reinforcement provides strength approximately six times greater than standard paper envelopes
• 1.5-inch expandable gusset accommodates bulky or multi-item contents
• Moisture-resistant construction protects contents from surface water exposure
• Self-seal closure eliminates the need for separate tape on most applications
• End-opening design allows easy loading of flat or stacked items
• White finish; 100 envelopes per pack

Compatibility

Designed as a general-purpose expandable mailer envelope suitable for standard postal and courier shipping of books, documents, catalogs, and similar bulky flat items.

Installation Notes

No tools are required for use. Activate the self-seal strip by folding and pressing firmly along the full width of the closure to ensure a secure bond before handing off to a carrier. Avoid overfilling beyond the rated 1.5-inch gusset depth, as exceeding capacity may compromise the seal or seam integrity during transit. Store unused envelopes flat in a dry environment to preserve the self-seal adhesive.