6x4x4 ECT-32-B White Corrugated Mailers 50/Bundle M644
$30.83
/ bundle of 50$0.62 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
6" × 4" × 4"
Board / material
ECT-32-B Corrugated
Color
White
Freight class
Class 125
Specifications
| Inside dimensions | 6" × 4" × 4" (L × W × H) |
|---|---|
| Board / material | ECT-32-B Corrugated |
| Color | White |
| Sold as | Bundle of 50 |
| Order in multiples of | 50 |
| Bundle weight | 8.84 lb |
| Outer carton (shipping) | 21.0 × 14.75 × 5.5 in |
| LTL freight class | Class 125 |
| SKU | M644 |
About this item
SKU M644 — 6" × 4" × 4", ECT-32-B Corrugated, White. Sold as a bundle of 50, shipped from US warehouses.
6x4x4" white corrugated mailers in ECT-32-B corrugated board, packed 50 per bundle (SKU M644); 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 bundle of 50.
Common questions
What does ECT-32-B mean, and why does it matter for my operation?
ECT (Edge Crush Test) 32-B indicates 32 lbs per inch of edge crush strength with B-flute corrugation. This rating ensures reliable protection for lightweight parcels while keeping material costs and shipping weight low, critical for high-volume fulfillment centers managing margin pressure.
Do I need tape or adhesive to close these mailers?
No. The one-piece design features integrated fold-and-tuck flaps that secure without tape, glue, or staples. This speeds packing by 15, 20 seconds per box and eliminates consumable costs.
What's the maximum weight these mailers can safely handle?
ECT-32-B mailers safely support 4, 5 lbs without crush risk under normal handling. For heavier items, consider ECT-44 or ECT-51 corrugated alternatives available in our catalog.
How do these compare to kraft paper mailers or padded envelopes in terms of freight efficiency?
Corrugated mailers provide crush resistance compared to padded envelopes while maintaining lower dimensional weight than rigid boxes. This reduces parcel surcharges and damage rates, delivering 20, 30% cost savings on high-volume shipping programs.
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.