6x5x4 Kraft Corrugated Mailers ECT-32-B Crush Resistant, 50-Pack
$64.95
/ bundle of 50$1.30 per mailer
Request bulk pricing
Ships from the nearest of 5 US warehouses · freight calculated at checkout
30-day returns on stock items · Return policy
Inside dimensions
6" × 5" × 4"
Board / material
ECT-32-B Corrugated
Color
Kraft
Freight class
Class 125
Specifications
| Inside dimensions | 6" × 5" × 4" (L × W × H) |
|---|---|
| Board / material | ECT-32-B Corrugated |
| Color | Kraft |
| Sold as | Bundle of 50 |
| Order in multiples of | 50 |
| Bundle weight | 10.34 lb |
| Outer carton (shipping) | 23.0 × 17.0 × 6.0 in |
| LTL freight class | Class 125 |
| GTIN | 848109055527 |
| SKU | M654K |
About this item
SKU M654K — 6" × 5" × 4", ECT-32-B Corrugated, Kraft. Sold as a bundle of 50, shipped from US warehouses.
The 6x5x4 Kraft Corrugated Mailers ECT-32-B Crush Resistant, 50-Pack is a corrugated mailer for books, catalogs, apparel, subscription kits, samples, documents, and small e-commerce orders. Listed specs include inside dimensions 6" x 5" x 4"; 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 rating mean, and how does it affect stacking performance?
ECT-32-B indicates an Edge Crush Test rating of 32 pounds per inch, meaning each linear inch of the box edge can support 32 lbs of vertical pressure. This rating supports reliable stacking in warehouses and during transit, protecting your inventory from compression damage while maintaining cost efficiency compared to higher ECT grades.
How much can I save on postage using these mailers versus standard shipping boxes?
These lightweight kraft mailers reduce dimensional weight charges compared to heavier corrugated alternatives. Exact savings depend on your carrier's DIM weight calculations, but typical reductions range from 5-15% per shipment. When multiplied across high-volume fulfillment operations, this generates substantial monthly savings.
Do these mailers require assembly equipment or special training?
No. These fold-and-tuck mailers assemble in seconds by hand, no machinery, tape, glue, or staples required. Your fulfillment team can integrate them into existing workflows immediately, reducing labor costs and assembly time per package.
Are these mailers suitable for fragile products, and what level of protection do they provide?
Yes. The double-wall construction on front and sides provides crush-resistant protection ideal for fragile items like glassware, electronics, and tools. While designed for lightweight shipments, the ECT-32-B rating ensures structural integrity under typical warehouse stacking and transit conditions, minimizing damage claims and returns.
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.