6.5x4.9x3.75 ECT-32 Kraft Corrugated Mailers 50/Bundle MLR4K
$40.24
/ bundle of 50$0.80 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 1/2" × 4.9" × 3 3/4"
Board / material
ECT-32-B Corrugated
Color
Kraft
Freight class
Class 125
Specifications
| Inside dimensions | 6 1/2" × 4.9" × 3 3/4" (L × W × H) |
|---|---|
| Board / material | ECT-32-B Corrugated |
| Color | Kraft |
| Sold as | Bundle of 50 |
| Order in multiples of | 50 |
| Bundle weight | 10.06 lb |
| Outer carton (shipping) | 22.0 × 17.0 × 6.0 in |
| LTL freight class | Class 125 |
| SKU | MLR4K |
About this item
SKU MLR4K — 6 1/2" × 4.9" × 3 3/4", ECT-32-B Corrugated, Kraft. Sold as a bundle of 50, shipped from US warehouses.
6.5x4.9x3.75" kraft corrugated mailers in ECT-32 corrugated board, packed 50 per bundle (SKU MLR4K); 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 how does it perform against standard mailers?
ECT (Edge Crush Test) -32-B indicates a 32 lbs/inch edge crush rating with B-flute corrugation, providing robust stacking strength for palletized operations. This specification delivers excellent crush resistance for small-to-medium parcels while maintaining lightweight shipping economics compared to heavier ECT-44 alternatives.
How much assembly time and labor do these one-piece mailers save?
Zero assembly required, these fold-and-tuck mailers are ready to pack in seconds with no tape, glue, or staples. High-volume fulfillment centers report 15-20% productivity gains versus traditional taped boxes, directly reducing labor costs per unit shipped.
Can these mailers stack safely during storage and transit?
Yes. ECT-32-B corrugation provides reliable stacking performance for warehouse storage and pallet loads. When properly loaded and stored flat, multiple bundles can be stacked without compression risk, maximizing cube utilization in your fulfillment center.
Are these boxes suitable for heavier items or just lightweight products?
Optimized for lightweight parcels under 5 lbs. For heavier shipments, consider ECT-44 or ECT-48 alternatives. These mailers excel in high-volume, low-weight scenarios where postage savings and rapid fulfillment are priorities, typical for e-commerce, returns, and subscription operations.
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.