4x3x1 ECT-32-B White Corrugated Mailers 50/Bundle M431
$23.55
/ bundle of 50$0.47 per mailer
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Secure checkout
| Quantity (bundle) | Item-subtotal discount |
|---|---|
| 1–2 | Base item price |
| 3–5 | 3% off qualifying item subtotal |
| 6+ | 5% off qualifying item subtotal |
| Pallet or repeat orders | Get a delivered quote |
Shipping & deliveryCheck cost to your ZIP code
Shipping & returns details
Ships from U.S. warehouses. 30-day returns on unopened stock items.
Shipping cost and timing depend on the product, quantity and destination. Parcel or freight service is used as appropriate. Shipping discounts apply only to qualifying orders and rates.
Standard delivery is to street addresses in the contiguous U.S. Eligible returns must be unused and in original packaging; return shipping may apply.
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Inside dimensions
4" × 3" × 1"
Board / material
ECT-32-B Corrugated
Color
White
Freight class
Class 125
From our customers
“The packaging is sturdy, well-made, and looks professional. We’re really pleased with the quality.”
“They helped us choose the right packaging for our products and made ordering easy.”
“Ordering was easy, everything arrived as described, and we’ll definitely order again.”
Questions before you order?Talk to us
Specifications
| Inside dimensions | 4" × 3" × 1" (L × W × H) |
|---|---|
| Board / material | ECT-32-B Corrugated |
| Color | White |
| Sold as | Bundle of 50 |
| Physical units per order increment | 50 (one bundle) |
| Bundle weight | 2.88 lb |
| Outer carton (shipping) | 10.75 × 10.0 × 6.0 in |
| LTL freight class | Class 125 |
| SKU | M431 |
About this item
SKU M431 — 4" × 3" × 1", ECT-32-B Corrugated, White. Sold as a bundle of 50, shipped from US warehouses.
4x3x1" white corrugated mailers in ECT-32-B corrugated board, packed 50 per bundle (SKU M431); 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 impact shipping performance?
ECT (Edge Crush Test) 32 indicates the corrugated can withstand 32 pounds of force per linear inch before crushing. The 'B' denotes standard corrugation. This rating is ideal for lightweight fragile items; it balances protection with postage efficiency by keeping overall box weight minimal while maintaining structural integrity under typical warehouse stacking conditions.
How many mailers can fit on a standard pallet, and what's the freight advantage?
The compact 4 x 3 x 1" footprint allows approximately 200-240 bundles (10,000-12,000 mailers) per pallet when optimally stacked. This density reduces per-unit freight costs by 40-50% versus smaller shipments and lowers dimensional weight charges for carriers, directly improving your bottom line on high-volume orders.
Do these mailers require assembly equipment or tape?
No. These are one-piece fold-and-tuck mailers that require zero tape, glue, staples, or equipment. They fold together in seconds by hand, eliminating labor costs and increasing packing speed by 60-80% compared to traditional boxes, making them ideal for high-throughput fulfillment operations.
Are these mailers suitable for heavier items or just lightweight products?
ECT-32-B corrugated is engineered for lightweight fragile items (typically under 2 lbs). The double-wall construction on front and sides provides excellent crush resistance for this weight class. For heavier merchandise, we recommend ECT-44 or ECT-48 alternatives to ensure safe delivery and compliance with carrier requirements.
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.