7x4x3 ECT-32-B White Corrugated Mailers 50-Pack M743
$29.30
/ bundle of 50$0.59 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
White
Freight class
Class 125
Specifications
| Inside dimensions | 7" × 4" × 3" (L × W × H) |
|---|---|
| Board / material | ECT-32-B Corrugated |
| Color | White |
| Sold as | Bundle of 50 |
| Order in multiples of | 50 |
| Bundle weight | 8.02 lb |
| Outer carton (shipping) | 18.0 × 15.75 × 5.5 in |
| LTL freight class | Class 125 |
| SKU | M743 |
About this item
SKU M743 — 7" × 4" × 3", ECT-32-B Corrugated, White. Sold as a bundle of 50, shipped from US warehouses.
7x4x3" white corrugated mailers in ECT-32-B corrugated board, packed 50 per pack (SKU M743); 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 mean, and why does it matter?
ECT (Edge Crush Test) -32 indicates the corrugated can withstand 32 lbs of pressure per linear inch before crushing. The B designation specifies a 200# board grade, ideal for lightweight items. This rating prevents product damage during stacking and transit, reducing return rates and customer complaints.
How many of these boxes fit on a standard pallet?
When flat-stacked in bundles of 50, you can stage 10-12 bundles (500-600 mailers) per pallet. This density translates to ~$12-15 freight savings per pallet versus pre-assembled mailers, with zero damage during consolidation.
Do I need tape or additional sealing materials?
No. The one-piece design folds and tucks in 3-4 seconds without tape, glue, or staples. You save approximately $0.04-0.08 per mailer on tape and labor, which adds up to $2-4 per bundle of 50.
What's the dimensional weight impact on carrier fees?
At 7 x 4 x 3 inches, this mailer keeps dimensional weight at 84 cubic inches. Most carriers charge dimensional weight only when exceeding 166 cubic inches, so you avoid surcharges on USPS, UPS, and FedEx for items under 5 lbs, typically saving $0.15-0.35 per shipment at scale.
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.