5x4x4 ECT-32-B Kraft Corrugated Mailers 50/Bundle
$44.81
/ bundle of 50$0.90 per mailer
Request bulk pricing
| Quantity (bundle) | Item-subtotal discount |
|---|---|
| 1–2 | Base item price |
| 3–5 | 3% off qualifying item subtotal |
| 6+ | 5% off qualifying item subtotal |
In stock · ships within 1 business day from the nearest of 5 US warehouses (IL, PA, TX, GA, CA) · 1–5 business days in transit · freight calculated at checkout · free ground shipping on orders over $99 (parcel rates up to $29.95) and over $500 (up to $120)
30-day returns on stock items · Return policy
Inside dimensions
5" × 4" × 4"
Board / material
ECT-32-B Corrugated
Color
Kraft
Freight class
Class 125
Specifications
| Inside dimensions | 5" × 4" × 4" (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 | 8.2 lb |
| Outer carton (shipping) | 21.0 × 13.75 × 5.75 in |
| LTL freight class | Class 125 |
| GTIN | 848109047669 |
| SKU | M544K |
About this item
SKU M544K — 5" × 4" × 4", ECT-32-B Corrugated, Kraft. Sold as a bundle of 50, shipped from US warehouses.
The 5x4x4" ECT-32-B Kraft 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 5" x 4" 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 mean, and why does it matter for my shipments?
ECT (Edge Crush Test) 32-B indicates the corrugated board can withstand 32 lbs of force per linear inch before crushing. This rating ensures reliable protection for fragile items during stacking and handling in transit and warehouse environments.
How much postage can I save compared to rigid boxes?
Kraft corrugated mailers weigh significantly less than traditional rigid shipping boxes, reducing dimensional and actual weight charges. Flat-shipped construction also lowers inbound freight costs and eliminates pre-assembly labor, improving bottom-line shipping efficiency.
Do these mailers require tape, glue, or assembly equipment?
No. The one-piece fold-and-tuck design allows mailers to assemble in seconds by hand, no tape, glue, staples, or equipment needed. This reduces packing labor and eliminates supply chain dependencies on adhesives.
Can I stack these mailers in my warehouse to maximize storage?
Yes. Because they ship and store flat, you can stack 50-unit bundles efficiently on shelving, significantly reducing cubic footage requirements compared to pre-assembled boxes and lowering warehouse overhead costs.
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.