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EVC41105

Front-Locking Corrugated Mailer

Available in a wide range of custom configurations & material selection.
Order 1 sample. Or order 100K+ units. Or anything in between.
Affordable delivery across North America.
Design support, warehousing, testing, assembly available.
Widest machinery capability in America via 30+ specialist partner plants.

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Product details

Top highlights

Double-thick front wall for clean unboxing presentation
Single-thick back wall reduces overall material usage
Parcel transit relies on an outer seal or label to keep the lid secure

About this product

This one-piece corrugated mailer features a double-thick, self-locking front wall that provides a clean edge for unboxing. By using a single-thick back wall instead of a full roll-over rear assembly, it reduces overall board usage while maintaining a strong presentation when opened.

Because the back wall relies on the closed lid to hold the rear corners square, this style fits kitting, retail presentation, or parcel shipping where an outer security seal will be applied.

Common uses

Subscription and E-commerce Unboxing
Apparel and Soft Goods Kitting
Retail and In-Store Presentation
Flat Goods and Print Collateral

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Kitting, Retail, and E-commerce Unboxing

Subscription and E-commerce Unboxing

The rolled front edge hides the corrugated flutes, creating a clean presentation when the customer lifts the lid. When secured with a branded label or outer seal, it performs well as a direct-to-consumer mailer.

Apparel and Soft Goods Kitting

The manual assembly and clean interior make it well-suited for clothing, textiles, and lightweight kits where heavy stacking strength is not the primary concern.

Retail and In-Store Presentation

For items handed directly to customers or sold off the shelf, the friction-fit lid tuck provides easy access and reclosure without requiring permanent adhesive.

Flat Goods and Print Collateral

The shallow depth and clean front edge make it a strong fit for brochures, catalogs, or flat promotional items that need a presentation-style opening without the bulk of a double-wall tray.

Fulfillment and Manual Packing Lines

High-Volume Fulfillment

The single-thick back wall reduces the overall footprint of the flat blank. This allows more boxes to fit on a single pallet during delivery and improves pallet density compared to heavier mailer styles.

Manual Packing Lines

The tray erects entirely by hand. Packers fold the side walls, roll the front wall over the dust flaps to lock it into the base, load the product, and tuck the lid.

Third-Party Kitting Operations

When a fulfillment center is assembling multi-item kits, the simple fold-and-tuck front wall speeds up the packing bench without requiring glue stations or automated erecting equipment.

Evaluating a Full Roll-Over Mailer

Heavy Pallet Stacking

Because the back wall is only a single layer of corrugated board, it does not offer the same vertical crush resistance as a mailer with double-thick walls on all sides. If the boxes will be stacked high on pallets without an outer master shipper, a standard full roll-over tray provides more vertical support.

Unsealed Courier Transit

The back corners of this mailer are held in place by the tension of the closed lid. If the lid opens during rough handling, the back wall can splay. If you cannot apply an external seal, consider a mailer with independent rear corner locks.

Board Thickness, Sealing, and Print Surfaces

Board Caliper and Fold Clearance

The front wall rolls over the side dust flaps. The gap for this fold must be precisely matched to your chosen board thickness. Changing from a thin E-flute to a thicker B-flute requires adjusting the CAD template so the front wall does not bow or tear.

External Sealing Strategy

Decide how the mailer will be secured for transit. A clear wafer seal, a branded sticker over the front tuck, or packing tape keeps the lid closed and maintains the structural integrity of the back corners.

Inside Printing

The front inner wall rolls over and displays the inside liner of the corrugated board. If you want a uniform color or continuous graphics upon opening, two-sided printing is required.

Insert and Partition Fit

If the tray will hold custom inserts, the single-thick back wall means the internal length is slightly longer than a double-roll-over tray of the same external footprint. Inserts must be sized to this specific internal clearance.

Locking Tabs and Tuck Depth Adjustments

Locking Tab Distribution

The front wall secures into the base using a series of tabs. The number and width of these tabs can be adjusted based on the width of the box and the required locking strength.

Lid Tuck Depth

The front tuck tab on the lid can be lengthened for a tighter friction fit or shortened for easier opening, depending on how the end user should interact with the package.

Dust Flap Length

The side dust flaps can be extended or shortened to change how much support they provide to the front and back corners during assembly.

Packing details

Flatbed Die-Cutting Requirements

The locking slots in the base and the tabs on the roll-over wall require precise steel rule placement. This package must be produced on a flatbed die-cutter rather than a simple rotary slotter.

Additional notes

Tooling and Slot Clearance

The locking slots in the base must be wide enough to strip cleanly during manufacturing. This requires flatbed die-cutting and careful matching of the slot width to the board thickness.

FAQs

Can this mailer be shipped through the mail unsealed?

The lid relies on a single friction-fit tuck tab. For parcel or courier networks, an external seal, sticker, or tape prevents the lid from opening and the back corners from splaying.

Does this box require glue to assemble?

The tray is erected manually by folding the panels and locking the front wall into the base slots. The back wall hinges up as the lid is closed, requiring no adhesive to form the shape.

What corrugated flutes fold cleanly for this design?

Thin boards like E-flute or F-flute fold cleanly at the front roll-over edge. Thicker boards like B-flute can be used, but the template's double crease must be widened to accommodate the extra material.

Why choose this over a standard double-wall mailer?

By using a single-thick back wall, this design reduces the total amount of corrugated board needed. This makes the flat blank smaller, which can improve nesting on the sheet for large runs.

What will the customer see when they open the box?

They will see a clean, folded front edge with no exposed flutes. However, because the front wall rolls inward, the inside liner of the board will be visible on that front panel unless the box is printed on both sides.

Why do the back corners sometimes feel loose before the box is closed?

Unlike the front wall, the back wall does not lock into the base. It simply folds up and relies on the side dust flaps and the closed lid to hold it at a 90-degree angle. Once the lid is tucked, the structure becomes secure.

Can I use a custom foam or corrugated insert with this tray?

Yes, but because the back wall is single-thick, the internal dimensions differ slightly from a standard double-wall mailer. The insert must be sized to match this specific internal footprint.

Should I request a physical sample before ordering?

A physical sample helps verify that the front double crease folds cleanly with your chosen board thickness and that the lid tuck provides the right amount of friction for your specific product.