Secure packaging, zero tape. Built for premium shipping.
Self-locking, double-walled custom mailer boxes that protect your products and assemble tape-free.
Tab Lock Mailer Boxes are one-piece, die-cut corrugated packaging containers designed for modern logistics. Also known as FEFCO 0427 or roll end tuck top mailers, these boxes feature a hinged lid, protective side dust flaps, and dual front tabs. The front tabs lock securely into engineered slots in the double-layered front wall of the box base. This physical latching mechanism builds a self-locking, double-walled structure on both the sides and the front when folded. You do not need packing tape, staples, or glue to assemble these shippers.
For online merchants, this design represents a practical balance of strength and presentation. The flat cardboard panels offer an uncluttered canvas for high-definition branding on both the interior and exterior surfaces. While stronger than simple shipping cartons, they assemble fast and help speed up shipping lines. They work well for shipping subscription kits, beauty products, electronics, and apparel.
Cubit manufactures these mailers using high-grade corrugated board designed to survive courier handling. We provide precise structural engineering so your packaging matches your exact product dimensions. Our local production reduces transit times and helps keep your delivery schedules on track.
Learn more in our [Complete Guide to Custom Tab Lock Mailer Boxes](/blog/guide-to-custom-tab-lock-mailer-boxes).
See how businesses across different sectors use this packaging
Protects delicate glass dropper bottles, compacts, and skincare jars during transit and presents them neatly on opening.
Provides structural rigidity and dual-wall drop protection for high-value items, working as both a shipper and a retail display.
Replaces plastic poly mailers to give clothing items a structured, premium presentation that prevents wrinkling.
Creates a sturdy, gift-ready presentation box capable of holding the weight of glass jars, coffee bags, and metal tins.
Speeds up fulfillment lines with simple, fast fold assembly while delivering a memorable unboxing experience to subscribers.
Acts as an organized container for influencer outreach kits and client appreciation gifts, matching your exact brand aesthetics.
Choose materials, printing, and finishing options
Natural, unbleached brown corrugated cardboard. Features visible wood fibers and a raw, organic texture. Great for eco-friendly, minimalist aesthetics.
Base price
Bleached white linerboard over a brown or white corrugated fluting core. Uncoated matte surface that absorbs ink well. Great for high-contrast colors.
+5%
Bleached white board with a thin, smooth clay coating (CCKB) that prevents ink absorption. Perfect for vibrant, sharp imagery.
+15%
Eco-premium unbleached kraft paperboard made entirely from municipal recycled paper streams. Earthy, warm, tactile feel.
+10%Thicker unbleached brown corrugated cardboard designed for heavier items up to 25 lbs. Features standard visible wood fibers.
+12%Thicker bleached white linerboard over a corrugated fluting core. Provides extra cushioning and strength for bulky items.
+17%Heavy-duty bleached white board with a clay coating (CCKB). Offers superior strength and vibrant color reproduction.
+25%Thicker, highly sustainable unbleached kraft paperboard made from municipal recycled paper streams. Offers heavy-duty protection.
+22%From concept to delivery in 4 simple steps
Share your requirements and get a detailed quote within 15 minutes during working hours. Our team reviews every project.
Receive a digital 3D mockup. Request unlimited revisions until you're 100% satisfied.
Your packaging enters production. Track progress through your dashboard in real-time.
Free shipping to your door. Standard delivery in 7-14 business days. Need it faster? Rush production delivers in 3-7 business days.
We offer sustainable alternatives for Tab Lock Mailer Boxes that don't compromise on quality. Choose eco-friendly materials and printing options to reduce your environmental impact.
100% Recyclable
Made from recyclable materials
FSC Certified Options
Responsibly sourced materials
Soy-Based Inks
Eco-friendly printing
Carbon Neutral
Offset shipping available
Complete technical specifications for Tab Lock Mailer Boxes
| finish types | Matte Aqueous, Gloss UV, Soft-Touch Lamination, Satin Aqueous, Scuff-Resistant Matte, Gloss Film, Spot UV, Metallic Foil |
| storage reqs | Store flat in a cool, dry warehouse environment away from direct moisture or high humidity. |
| print quality | High-resolution digital (300 DPI+), Flexographic (up to 3 PMS colors), or Lithographic (offset-grade 150 LPI+) |
| assembly style | Self-locking FEFCO 0427 (Roll End Tuck Top with Dust Flaps and Tab Locks). Requires no tape or adhesive. |
| eco credentials | FSC Certified, 100% Recyclable, Biodegradable (unlaminated), Recycled PCW options available |
| weight capacity | Up to 10 lbs (4.5 kg) for E-Flute; Up to 25 lbs (11.3 kg) for B-Flute |
| material thickness | E-Flute (1/16 inch / 1.6 mm) or B-Flute (1/8 inch / 3.2 mm) |
| production location | Manufactured locally in regional production facilities to reduce shipping transit emissions. |
Experience the future of custom packaging with our AI-powered platform
Transform your ideas into print-ready packaging designs in minutes, not weeks. Our AI understands packaging constraints, bleed areas, and dieline requirements.
Get instant, expert recommendations tailored to your product. Our AI analyzes your requirements and suggests optimal materials, sizes, and finishes.
Real-time pricing in seconds
Start from just 250 units
7-14 day turnaround
Expert designers included
Worldwide delivery
100% satisfaction
Everything you need to know about Tab Lock Mailer Boxes. Can't find the answer you're looking for? Chat with our AI consultant.
Our AI packaging consultant can answer your specific questions and help you choose the perfect configuration.
Chat with AI ExpertOur packaging experts are available Monday-Friday, 9am-6pm.
