7x3x1" ECT-32-B White Corrugated Mailers - Crush Resistant, 50-Pack

$25.53
/ bundle of 50$0.51 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
7" × 3" × 1"
Board / material
ECT-32-B Corrugated
Color
White
Freight class
Class 125
Specifications
| Inside dimensions | 7" × 3" × 1" (L × W × H) |
|---|---|
| Board / material | ECT-32-B Corrugated |
| Color | White |
| Sold as | Bundle of 50 |
| Order in multiples of | 50 |
| Bundle weight | 3.9 lb |
| Outer carton (shipping) | 13.75 × 10.0 × 5.75 in |
| LTL freight class | Class 125 |
| GTIN | 848109007595 |
| SKU | M731 |
About this item
SKU M731 — 7" × 3" × 1", ECT-32-B Corrugated, White. Sold as a bundle of 50, shipped from US warehouses.
Common questions
What ECT rating is this mailer, and how does it perform under stacking?
ECT-32-B offers 32 ECT (edge crush test) strength, supporting vertical stacking loads of 22 lbs per box when stored 4-high. This rating suits light-to-medium items; verify your item weight against stacking depth requirements in your warehouse environment.
How much labor time does the fold-and-tuck design save versus tape-and-seal boxes?
Workers fold these mailers in 2, 4 seconds per unit with zero additional supplies. Compared to taping traditional boxes, you eliminate tape waste, labor time, and tool requirements, saving 15, 25 seconds per box in high-volume operations.
Can I order partial bundles, or do I need to buy in 50-unit increments?
Standard purchase unit is 50 mailers per bundle. Contact our sales team for custom order minimums or pallet-quantity pricing if your volume requires different configurations.
Are these mailers USPS, UPS, and FedEx compliant for dimensional weight calculations?
Yes. At 731", these mailers fall within standard carrier guidelines and qualify for lightweight dimensional weight handling, reducing your per-piece shipping costs on economy and ground services.
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.



