5x4x3 ECT-32 Kraft Corrugated Mailers 50-Pack M543K
$34.93
/ bundle of 50$0.70 per mailer
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Secure checkout
| Quantity (bundle) | Item-subtotal discount |
|---|---|
| 1–2 | Base item price |
| 3–5 | 3% off qualifying item subtotal |
| 6+ | 5% off qualifying item subtotal |
| Pallet or repeat orders | Get a delivered quote |
Shipping & deliveryCheck cost to your ZIP code
Shipping & returns details
Ships from U.S. warehouses. 30-day returns on unopened stock items.
Shipping cost and timing depend on the product, quantity and destination. Parcel or freight service is used as appropriate. Shipping discounts apply only to qualifying orders and rates.
Standard delivery is to street addresses in the contiguous U.S. Eligible returns must be unused and in original packaging; return shipping may apply.
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Inside dimensions
5" × 4" × 3"
Board / material
ECT-32-B Corrugated
Color
Kraft
Freight class
Class 125
From our customers
“The packaging is sturdy, well-made, and looks professional. We’re really pleased with the quality.”
“They helped us choose the right packaging for our products and made ordering easy.”
“Ordering was easy, everything arrived as described, and we’ll definitely order again.”
Questions before you order?Talk to us
Specifications
| Inside dimensions | 5" × 4" × 3" (L × W × H) |
|---|---|
| Board / material | ECT-32-B Corrugated |
| Color | Kraft |
| Sold as | Bundle of 50 |
| Physical units per order increment | 50 (one bundle) |
| Bundle weight | 7.06 lb |
| Outer carton (shipping) | 18.0 × 13.75 × 5.75 in |
| LTL freight class | Class 125 |
| SKU | M543K |
About this item
SKU M543K — 5" × 4" × 3", ECT-32-B Corrugated, Kraft. Sold as a bundle of 50, shipped from US warehouses.
5x4x3" kraft corrugated mailers in ECT-32 corrugated board, packed 50 per pack (SKU M543K); this is a second listing of the same BOX case stock at the same price.
Sized for shipping and fulfillment work; closes with tape or the built-in flap. Order by the pack of 50.
Common questions
What does ECT-32-B rating mean, and how does it affect stacking performance?
ECT (Edge Crush Test) 32-B indicates the mailer can withstand 32 pounds per inch of edge crush force. This rating supports safe stacking of 4-6 units high under typical warehouse conditions, making it suitable for fulfillment operations with moderate inventory density and short-term storage.
How much assembly time does the fold-and-tuck design save compared to taped boxes?
One-piece mailers fold and secure in 2-3 seconds with zero assembly supplies needed. For high-volume operations, this eliminates tape gun fatigue, reduces per-unit labor costs by 40-60%, and cuts material overhead since no additional sealing materials are required.
Will these mailers fit standard conveyor systems and packing station workflows?
Yes. The compact 5 x 4 x 3" dimensions and lightweight profile work directly in automated and manual fulfillment lines. Pre-fold capability allows workers to assemble mailers on-demand at packing stations, reducing idle inventory and improving workflow flexibility.
How do flat-shipped mailers reduce my freight and storage costs?
Flat mailers reduce cubic volume by ~85% versus pre-assembled boxes, lowering inbound freight costs and warehouse racking requirements. A pallet of 5,000 mailers occupies roughly 8-10 cubic feet versus 40+ cubic feet for pre-assembled alternatives, directly improving your storage density and supply chain economics.
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.