Bsc Preferred RM4K Stayflat Chipboard Mailer 100pk

Product Description

The BSC PREFERRED RM4K is a rigid stayflat mailer designed to protect photos, documents, and other flat materials during shipping and handling. Constructed from .028 kraft chipboard, each mailer provides firm, lightweight protection without requiring additional stiffeners. The peel-and-seal closure secures contents quickly, and a pull tab tear strip allows recipients to open the mailer cleanly without tools. Cases contain 100 mailers. The lightweight construction helps keep postage costs down, making these mailers a practical choice for high-volume mailing operations in office, warehouse, and fulfillment environments.

The RM4K mailer is suited for shipping flat, rigid, or semi-rigid items such as prints, photos, certificates, contracts, and similar documents that require protection from bending and creasing in transit. These mailers are commonly used by fulfillment centers, print shops, offices, and distribution operations that process regular outbound mail. Each case contains 100 units, supporting bulk mailing workflows. This product is noted as equivalent to part number S-5616.

Key Features

• Manufactured from .028 kraft chipboard for rigid, bend-resistant protection
• Lightweight construction reduces postage costs compared to heavier mailer types
• No additional stiffeners required - chipboard construction handles protection on its own
• Peel-and-seal closure for fast, secure sealing without tape or equipment
• Pull tab tear strip allows clean, easy opening by the recipient
• Sold in cases of 100 mailers for bulk mailing efficiency

Compatibility

Equivalent to part number S-5616. Designed as a stayflat mailer for standard flat-item shipping applications requiring rigid chipboard protection.

Installation Notes

No tools or equipment are required for use. Insert contents, remove the peel-and-seal liner, and press the flap firmly to close. Verify that contents are fully seated and centered before sealing to prevent shifting in transit. Store unused mailers flat in a dry environment to prevent warping of the chipboard.