8x4x3 ECT-32-B Kraft Corrugated Mailers - Crush Resistant, 50-Pack
$49.37
/ bundle of 50$0.99 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
8" × 4" × 3"
Board / material
ECT-32-B Corrugated
Color
Kraft
Freight class
Class 125
Specifications
| Inside dimensions | 8" × 4" × 3" (L × W × H) |
|---|---|
| Board / material | ECT-32-B Corrugated |
| Color | Kraft |
| Sold as | Bundle of 50 |
| Order in multiples of | 50 |
| Bundle weight | 8.92 lb |
| Outer carton (shipping) | 18.0 × 16.75 × 6.0 in |
| LTL freight class | Class 125 |
| GTIN | 848109037608 |
| SKU | M843K |
About this item
SKU M843K — 8" × 4" × 3", ECT-32-B Corrugated, Kraft. Sold as a bundle of 50, shipped from US warehouses.
The 8x4x3 ECT-32-B Kraft Corrugated Mailers - Crush Resistant, 50-Pack is a corrugated mailer for books, catalogs, apparel, subscription kits, samples, documents, and small e-commerce orders. Listed specs include inside dimensions 8" x 4" x 3"; 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 is the ECT rating and why does it matter?
ECT-32-B indicates 32 ECT (Edge Crush Test) with B-flute corrugation. This rating ensures the mailer withstands stacking pressure and rough handling during fulfillment and transit. Higher ECT = greater crush resistance for fragile items.
How much warehouse space and freight can I save compared to pre-assembled boxes?
Flat-shipped mailers reduce storage footprint by up to 80% and lower inbound freight weight significantly. One-piece fold design eliminates separate shipping for packaging supplies, consolidating inventory and reducing fulfillment labor by 8 - 12 seconds per box.
Do these mailers require tape, glue, or staples to close?
No. The die-cut fold-and-tuck design closes securely without adhesives or fasteners. Simply fold the flaps down and tuck, use for high-volume operations where speed and consistency matter.
What products are best suited for 8 x 4 x 3" mailers?
Ideal for small tools, glassware, electronics, jewelry, cosmetics, small parts, and fragile goods under 5 lbs. The compact dimensions optimize dimensional weight charges while the double-wall construction protects contents during multi-carrier transit.
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.