4x4x20 Shipping Boxes — ECT-32 Kraft Corrugated, 25-Pack
$28.70
/ bundle of 25$1.15 per box
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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
4" × 4" × 20"
Board / material
ECT-32 Single Wall Corrugated
Color
Kraft
Freight class
Class 125
Specifications
| Inside dimensions | 4" × 4" × 20" (L × W × H) |
|---|---|
| Board / material | ECT-32 Single Wall Corrugated |
| Color | Kraft |
| Sold as | Bundle of 25 |
| Order in multiples of | 25 |
| Bundle weight | 7.84 lb |
| Outer carton (shipping) | 24.5 × 9.0 × 8.75 in |
| LTL freight class | Class 125 |
| GTIN | 841436019637 |
| SKU | 4420 |
About this item
SKU 4420 — 4" × 4" × 20", ECT-32 Single Wall Corrugated, Kraft. Sold as a bundle of 25, shipped from US warehouses.
The 4x4x20 ECT-32 Kraft Corrugated Boxes - 25 Pack Bundle is a shallow corrugated shipping box for books, binders, framed prints, catalogs, folded apparel, and other low-profile items. Listed specs include inside dimensions 4" x 4" x 20"; kraft material; ECT-32; bundle of 25. Use it as a shipping carton, mailing box, storage box, or e-commerce shipper when the item fits the listed dimensions.
Ideal for shipping apparel, shoes, books, household goods, and everyday ecommerce orders. A sturdy, reliable choice for small-business, Etsy, and ecommerce shippers.
Ecommerce shipping boxes: Good fit for shipping apparel, shoes, books, household goods, small appliances, warehouse picks, and everyday ecommerce orders. These corrugated boxes help small businesses, ecommerce teams, and warehouse shippers match products to the right box size for everyday fulfillment.
Common questions
What does ECT-32 mean, and why does it matter for my warehouse?
ECT-32 refers to Edge Crush Test rating of 32 pounds per linear inch. This indicates strong compressive strength, ensuring boxes withstand stacking pressure and protect contents during transport and warehouse storage without crushing or delaminating.
Can these boxes replace mailing tubes for long items?
Yes. The 4 x 4 x 20" dimension accommodates rolled documents, posters, and tubes while offering more protection and easier sealing than traditional mailing tubes. The rigid corrugated walls prevent denting and crushing during transit.
How does the tall profile improve freight efficiency?
Vertical boxes reduce overall pallet height for the same unit volume, lowering dimensional weight charges on LTL shipments and parcel carriers. This directly reduces shipping costs per unit when moving multiple boxes to a single destination.
What's the best way to stack and store these boxes before use?
Store flat boxes in a dry, climate-controlled environment away from moisture. Stack bundles horizontally on pallets up to 4 - 5 high to prevent edge damage. Keep away from heat sources and direct sunlight to maintain material integrity and structural performance.
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.