18x18x40" Telescoping Inner Box ECT-32 Kraft - Adjustable Height, Bundle of 10
$139.94
/ bundle of 10$13.99 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
18" × 18" × 40"
Board / material
ECT-32 Single Wall Corrugated
Color
Kraft
Freight class
Class 125
Specifications
| Inside dimensions | 18" × 18" × 40" (L × W × H) |
|---|---|
| Board / material | ECT-32 Single Wall Corrugated |
| Color | Kraft |
| Sold as | Bundle of 10 |
| Order in multiples of | 10 |
| Bundle weight | 30.2 lb |
| Outer carton (shipping) | 58.25 × 36.25 × 3.25 in |
| LTL freight class | Class 125 |
| GTIN | 848109003580 |
| SKU | T181840INNER |
About this item
SKU T181840INNER — 18" × 18" × 40", ECT-32 Single Wall Corrugated, Kraft. Sold as a bundle of 10, shipped from US warehouses.
Adjustable two-piece telescoping inner boxes designed for tall and irregularly shaped items. 18 " x 18 " x 40 " dimensions in ECT-32 kraft corrugated with full overlap bottom for added strength. Sold in bundles of 10, pair with T181840OUTER to complete your shipping solution.
Nearby exact-spec options
Use these when the size, material, pack quantity, or workflow is close but not identical.
Common questions
Do I need the outer carton to use these inner boxes?
Yes. These telescoping inner cartons work as a two-piece system with the T181840OUTER carton. The inner carton slides into the outer carton to create the complete protective container. Both must be purchased separately to complete your set.
What height range does the telescoping design accommodate?
The telescoping inner carton compresses for flat storage and extends up to 40" to fit tall items. This adjustability eliminates the need to stock multiple box sizes for variable-height shipments, reducing SKU proliferation and warehouse complexity.
How does ECT-32 compare to heavier corrugated grades for stacking?
ECT-32 (Edge Crush Test 32 pounds per inch) is engineered for standard single-wall shipping applications with reliable stacking performance up to 5 - 7 pallets high, depending on box fill weight. The full overlap bottom adds critical reinforcement for edge protection during warehouse handling and transit.
Can these boxes be recycled after use?
Yes. 100% kraft corrugated material is fully recyclable and compostable. Including recycled content in your sustainability messaging strengthens your ESG profile with eco-conscious supply chain partners.
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.