In stock SKU M664KGTIN 841436005319

6x6x4 Kraft Corrugated Mailers - ECT-32-B Crush Resistant, Bundle of 50

Ship small items with confidence using these 6x6x4 kraft corrugated mailers constructed from durable ECT-32-B material. One-piece fold-and-tuck design requires no tape, glue, or staples–assembly takes seconds. Bundle of 50 ships and stores flat, maximizing warehouse efficiency and reducing freight costs.
$65.92 / bundle of 50$1.32 per mailer
= 50 mailers · Total $65.92
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 dimensions6" × 6" × 4" (L × W × H)
Board / materialECT-32-B Corrugated
ColorKraft
Sold asBundle of 50
Order in multiples of50
Bundle weight12.5 lb
Outer carton (shipping)25.25 × 19.0 × 6.0 in
LTL freight classClass 125
GTIN841436005319
SKUM664K
M664K dimension diagram showing 6 x 6 x 4 inch mailers.
Inside dimensions shown

About this item

SKU M664K — 6" × 6" × 4", ECT-32-B Corrugated, Kraft. Sold as a bundle of 50, shipped from US warehouses.

6x6x4 Kraft Corrugated Mailers - ECT-32-B, Bundle of 50. Use this item for shipments or presentation packs where the product fits the listed inside dimensions and closure style. Listed specs include size 6 x 6 x 4 in; material kraft; sold as Bundle of 50. Confirm SKU, pack count, price, availability, and checkout delivery before ordering.

Frequently bought with

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.

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