7x4x1 Corrugated Mailers - ECT-32 White Crush Resistant, 50-Pack
$32.92
/ bundle of 50$0.66 per mailer
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Ships from the nearest of 5 US warehouses · freight calculated at checkout
30-day returns on stock items · Return policy
Inside dimensions
7" × 4" × 1"
Board / material
ECT-32-B Corrugated
Color
White
Freight class
Class 125
Specifications
| Inside dimensions | 7" × 4" × 1" (L × W × H) |
|---|---|
| Board / material | ECT-32-B Corrugated |
| Color | White |
| Sold as | Bundle of 50 |
| Order in multiples of | 50 |
| Bundle weight | 5.32 lb |
| Outer carton (shipping) | 16.0 × 12.0 × 6.0 in |
| LTL freight class | Class 125 |
| GTIN | 848109007670 |
| SKU | M741 |
About this item
SKU M741 — 7" × 4" × 1", ECT-32-B Corrugated, White. Sold as a bundle of 50, shipped from US warehouses.
The 7x4x1 ECT-32-B White Corrugated Mailers - Crush Resistant is a corrugated mailer for books, catalogs, apparel, subscription kits, samples, documents, and small e-commerce orders. Listed specs include inside dimensions 7" x 4" x 1"; white material; ECT-32-B; bundle of 50. The mailer format works when the product needs a presentation-style carton or compact shipping box instead of a standard RSC case.
Ideal for shipping apparel, books, mugs, accessories, gifts, and small fragile items. A sturdy, reliable choice for small-business, Etsy, and ecommerce shippers.
Common questions
What does ECT-32-B mean and how does it affect protection?
ECT (Edge Crush Test) 32-B indicates the corrugated meets 32 lbs per linear inch of crush resistance, meeting ASTM D5628 standards. This rating ensures reliable stacking and compression performance during multi-box shipments, reducing content damage in high-volume fulfillment environments.
How much assembly labor does one-piece design save versus traditional boxes?
Fold-and-tuck design eliminates tape, glue, and stapling steps, operators can assemble 200+ mailers per hour versus 60-80 with taped boxes. For a 10,000-unit monthly volume, this saves approximately 45-50 labor hours.
What is the maximum recommended weight per mailer?
Due to 1" height and ECT-32-B construction, we recommend maximum 2-3 lbs per mailer for optimal protection. Heavier items may require larger corrugated options (7x4x2 or larger) to maintain performance and prevent box collapse.
Are these mailers compatible with automated packing systems?
Yes. The one-piece design and consistent fold architecture integrate smoothly with most semi-automated and automated pick-and-pack systems. Pre-scored creases ensure reliable, repeatable folding without equipment jams or misfeeds.
Order support
Questions on specs or freight?
Send the SKU, quantity, and delivery ZIP and we will confirm specs, availability, and freight before you order.