5x4x2" ECT-32-B Kraft Corrugated Mailers - One-Piece Design, Bundle of 50
$29.57
/ bundle of 50$0.59 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
5" × 4" × 2"
Board / material
ECT-32-B Corrugated
Color
Kraft
Freight class
Class 125
Specifications
| Inside dimensions | 5" × 4" × 2" (L × W × H) |
|---|---|
| Board / material | ECT-32-B Corrugated |
| Color | Kraft |
| Sold as | Bundle of 50 |
| Order in multiples of | 50 |
| Bundle weight | 5.5 lb |
| Outer carton (shipping) | 15.0 × 13.75 × 5.5 in |
| LTL freight class | Class 125 |
| GTIN | 841436082556 |
| SKU | M542K |
About this item
SKU M542K — 5" × 4" × 2", ECT-32-B Corrugated, Kraft. Sold as a bundle of 50, shipped from US warehouses.
The 5x4x2" ECT-32-B Kraft Corrugated Mailers - One-Piece Design is a corrugated mailer for books, catalogs, apparel, subscription kits, samples, documents, and small e-commerce orders. Listed specs include inside dimensions 5" x 4" x 2"; 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.
Nearby exact-spec options
Use these when the size, material, pack quantity, or workflow is close but not identical.
Common questions
What ECT rating does this mailer have and why does it matter?
ECT-32-B provides excellent crush resistance for small parcels under 2 lbs. ECT (Edge Crush Test) rating indicates the mailer's ability to withstand stacking pressure, critical for warehouse operations where boxes are stacked multiple pallets high. ECT-32 is the sweet spot for lightweight items, balancing protection and cost-per-unit.
How much assembly labor does this save compared to traditional tape-sealed mailers?
One-piece folding mailers assemble in 3-5 seconds with no tape, glue, or staples required. For a 10,000-unit annual order, this eliminates approximately 40+ hours of assembly labor and eliminates tape/adhesive material costs, delivering 15-20% operational savings per box.
Can these mailers be used for fragile items like glassware?
Yes. Double-wall construction on the front and sides provides crush resistance and impact protection. For maximum protection, pair with internal void-fill materials like crinkle paper or bubble wrap to absorb shock during transit.
How do flat-ship mailers improve freight efficiency?
Shipping and storing flat reduces volumetric weight by 60-70% compared to pre-assembled boxes. Fewer pallets required per shipment means lower freight costs, faster inventory turnover, and reduced warehouse space overhead, essential for high-volume fulfillment 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.