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The QUALITY PARK QUAR4500 is a white, open-end expansion mailer constructed from 14 lb DuPont Tyvek, a material known for resisting ripping, tearing, punctures, water, and moisture. Each mailer measures 10 x 13 inches with a 1.5-inch expansion gusset that accommodates bulky but lightweight contents without the need for a box or carton. The Flap-Stik peel and seal closure creates a secure bond without additional tape or tools. This carton contains 100 mailers, making it a practical stock item for mail rooms, shipping departments, or field operations that handle regular outbound document and product fulfillment.
These mailers are suited for shipping or mailing items that exceed the capacity of standard flat envelopes but do not require rigid box packaging. The expansion gusset allows the mailer to conform to padded documents, small parts, folded garments, or other lightweight bulky contents. The Tyvek construction keeps contents protected against incidental moisture and handling abuse during transit. They are appropriate for both internal distribution and outbound customer shipments in office, warehouse, and distribution center environments.
Designed as a general-purpose expansion mailer for use in standard mail room, shipping, and fulfillment operations requiring moisture-resistant, tear-resistant packaging for bulky lightweight items.
No tools are required for use. Peel the protective strip from the Flap-Stik closure and press the flap firmly against the mailer face to seal. Ensure contents are positioned to allow the gusset to expand evenly before sealing. Apply shipping labels to the flat face of the mailer on a clean, dry surface for best adhesion.
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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