6x6x4 Kraft Corrugated Mailers - ECT-32-B Crush Resistant, Bundle of 50
$65.92
/ bundle of 50$1.32 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
6" × 6" × 4"
Board / material
ECT-32-B Corrugated
Color
Kraft
Freight class
Class 125
Specifications
| Inside dimensions | 6" × 6" × 4" (L × W × H) |
|---|---|
| Board / material | ECT-32-B Corrugated |
| Color | Kraft |
| Sold as | Bundle of 50 |
| Order in multiples of | 50 |
| Bundle weight | 12.5 lb |
| Outer carton (shipping) | 25.25 × 19.0 × 6.0 in |
| LTL freight class | Class 125 |
| GTIN | 841436005319 |
| SKU | M664K |
About this item
SKU M664K — 6" × 6" × 4", ECT-32-B Corrugated, Kraft. Sold as a bundle of 50, shipped from US warehouses.
The 6x6x4 Kraft Corrugated Mailers - ECT-32-B Crush Resistant is a corrugated mailer for books, catalogs, apparel, subscription kits, samples, documents, and small e-commerce orders. Listed specs include inside dimensions 6" x 6" 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 how does it compare to other corrugated ratings?
ECT (Edge Crush Test) 32-B indicates the corrugated can withstand 32 lbs of crushing force per linear inch of edge. This mid-range rating is ideal for small parcels and light-to-medium weight items. Higher ECT (42-B, 44-B) suits heavier freight; lower ECT (20-B) works for minimal-protection applications.
How much warehouse space do these mailers save compared to pre-assembled boxes?
Flat-stored kraft mailers consume up to 40% less cubic footage than pre-assembled boxes of equivalent size. For operations managing 10,000+ units monthly, this translates to reclaiming valuable warehouse real estate and reducing facility overhead costs.
Can these mailers stack safely in transit without damage?
Yes. The ECT-32-B double-wall construction and fold-and-tuck design create crush-resistant stacking performance. These mailers maintain structural integrity under standard pallet loads and multi-tier stacking in trucks and freight containers.
What's the freight efficiency benefit of this 6x6x4 size?
The compact 6x6x4" footprint reduces dimensional weight charges on most carrier networks while accommodating 85% of small e-commerce parcels. This size optimizes pallet utilization and carrier fees, delivering 8-12% lower shipping costs per unit versus oversized boxes.
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.