7x4x3 Kraft Corrugated Mailers ECT-32-B Crush Resistant - Bundle 50
$39.64
/ bundle of 50$0.79 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" × 3"
Board / material
ECT-32-B Corrugated
Color
Kraft
Freight class
Class 125
Specifications
| Inside dimensions | 7" × 4" × 3" (L × W × H) |
|---|---|
| Board / material | ECT-32-B Corrugated |
| Color | Kraft |
| Sold as | Bundle of 50 |
| Order in multiples of | 50 |
| Bundle weight | 8.14 lb |
| Outer carton (shipping) | 18.0 × 15.75 × 5.75 in |
| LTL freight class | Class 125 |
| GTIN | 848109008660 |
| SKU | M743K |
About this item
SKU M743K — 7" × 4" × 3", ECT-32-B Corrugated, Kraft. Sold as a bundle of 50, shipped from US warehouses.
The 7x4x3 Kraft Corrugated Mailers ECT-32-B Crush Resistant Bundle 50 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 3"; kraft 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 stacking performance?
ECT (Edge Crush Test) 32 pounds per inch indicates the corrugated can withstand 32 lbs of crushing force per linear inch. This specification supports multi-layer stacking in warehouses and during transit, ensuring your shipments arrive undamaged and protecting contents from compression in high-volume fulfillment centers.
How much postage savings can we expect versus standard cardboard boxes?
ECT-32-B kraft corrugated weighs significantly less than heavier corrugated grades, reducing dimensional weight charges on FedEx, UPS, and USPS. For high-volume shippers, switching to lightweight crush-resistant mailers typically yields 5-15% postage savings per shipment depending on carrier and service level.
Do these mailers require tape, glue, or assembly equipment?
No. These one-piece mailers fold and tuck closed in seconds with zero additional materials. This eliminates tape costs, reduces labor time in fulfillment operations, and removes equipment maintenance requirements, ideal for high-speed packing operations.
What items are best suited for 7 x 4 x 3" mailers?
This size optimizes shipping for small, lightweight products: hand tools, jewelry, cables, samples, documents, glassware, small electronics, and promotional items. The double-wall crush-resistant design protects fragile contents while the compact footprint minimizes wasted dimensional weight on carriers.
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.