Description
Corrugated Tab Lock Literature Mailers are rigid paperboard shipping boxes engineered specifically for protecting and mailing flat documents, catalogs, brochures, and marketing materials. These 16″L x 12″W x 2″H mailers feature a convenient tab-and-lock closure system that eliminates the need for tape, staples, or additional fastening materials, making them ideal for high-volume mailing operations.
Key product specifications include a 200lb. Test kraft construction with ECT-32 (Edge Crush Test) rating, ensuring excellent durability and compression strength during transit and stacking. The kraft paperboard material is both lightweight and protective, reducing dimensional weight charges while safeguarding contents from moisture, dirt, and minor impacts. The intuitive tab lock closure design provides a secure, tamper-evident seal without adhesive, cutting labor time and eliminating messy tape applications. Each package contains 50 individual mailers, offering bulk efficiency for businesses that mail consistently. The natural kraft finish presents a professional appearance while remaining cost-effective, and the boxes are fully recyclable and made from sustainably sourced materials, supporting corporate environmental initiatives.
End-users include marketing departments, promotional agencies, publishing companies, e-commerce businesses, and corporate communications teams who regularly mail flat materials such as product brochures, annual reports, direct mail campaigns, educational catalogs, training manuals, and marketing collateral. Insurance agencies, financial institutions, and healthcare providers frequently use these mailers for document distribution. Nonprofits and educational organizations benefit from the cost efficiency when conducting large-scale fundraising mailers or student recruitment campaigns. Printing and fulfillment service providers stock these mailers to offer complete mailing solutions to their clients. The 2-inch depth accommodates moderate quantities of paper without requiring oversized boxes, making this size the sweet spot for standard literature bundles that would be damaged or over-protected in larger mailers.
When evaluating corrugated literature mailers, buyers should prioritize several factors: bursting strength and edge crush test (ECT) ratings determine how well boxes protect contents during stacking and transport; ECT-32 is suitable for moderate-weight documents and light to medium shipment stacking. Consider your mailpiece weight and dimensions—this 16x12x2 size is optimized for standard-sized literature, so confirm your typical contents fit comfortably without excess void space. Evaluate closure mechanisms; tab-lock designs save time and reduce waste compared to tape-sealed alternatives. Assess your volume requirements and storage space; purchasing in bulk (50-count packages) reduces per-unit costs but requires adequate warehouse capacity. Review the kraft vs. white finish options—kraft provides economy and eco-friendly positioning, while white offers premium appearance for higher-end marketing materials. Finally, confirm compliance with USPS and carrier dimension/weight requirements to avoid surcharges and ensure smooth delivery processing.
What size should I order if my literature is slightly larger than 16×12 inches?
The 16″L x 12″W x 2″H mailer accommodates materials up to approximately 15.5″ x 11.5″ when accounting for interior clearance. If your documents consistently exceed these dimensions, consider upgrading to the next size category (typically 18×12 or larger). Forcing oversized materials into undersized boxes risks damage, may cause mailers to fail during transit, and can trigger carrier surcharges for non-standard shapes.
How do the tab lock closures work, and are they reusable?
The tab lock closure system features interlocking flaps where tabs on the top flap insert into slots on the bottom flap, creating a secure seal without adhesive. Simply fold the top flap down and push the tabs into place until you hear or feel them lock—no tape, staples, or tools required. While the boxes themselves are sturdy, the tab lock closure is designed for single-use shipments. Recipients can open the box by pulling the tabs apart, but the flaps are not designed to re-lock reliably after initial opening, so reuse is not recommended for secure reshipping.
What is the difference between ECT-32 and higher ECT ratings, and which do I need?
ECT (Edge Crush Test) measures a box’s resistance to crushing force, with higher numbers indicating stronger material. ECT-32 provides approximately 32 pounds of force resistance per linear inch of edge. ECT-40 and ECT-48 ratings offer increased protection for heavier items, stacked shipments, or rough handling environments. For typical literature mailers containing paper documents with moderate stacking during warehouse and transit operations, ECT-32 kraft construction is sufficient and cost-effective. Choose higher ECT ratings only if your contents are exceptionally heavy, boxes will be stacked multiple units high, or shipments travel through high-impact distribution channels.






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