Good fit for products that match the listed inside dimensions, box style, board strength when shown, and bundle quantity. Confirm inside dimensions, board strength if listed, box style, assembled fit, and how much void fill or protection the item needs.

Best For
How to choose
Specs at a Glance
| Material | ECT-32 Single Wall Kraft Corrugated |
| Dimensions | 4" W x 4" D x 48" H |
| Construction | Two-Piece Telescoping with Full Overlap Bottom |
| Sold As | Bundle of 25 Inner Boxes |
| Recyclable | Yes |
Common Use Cases
- Packing ecommerce orders, replenishment shipments, parts, office supplies, or warehouse transfers.
- Comparing box sizes for product fit, storage space, parcel cost, and reorder quantity.
- Reordering by exact product link, SKU, or sold-as quantity.
- Adding the item to a mixed-SKU or recurring supply request when quantity, delivery ZIP code, or timing matters.
What You'll Receive
- This listing is sold as Bundle of 25. Check the current product page for variant details, price, availability, and pack count before checkout.
Shipping & Packaging
Frequently Asked Questions
The inner box (T4448INNER) slides into the outer box (T4448OUTER) to create an adjustable fit. This allows you to customize box height to match product length, reducing void fill waste and dimensional weight charges while maintaining consistent bottom footprint dimensions across shipments.
ECT-32 indicates edge crush test strength of 32 pounds per linear inch, ideal for single-wall corrugated with moderate stacking loads. The full overlap bottom reinforces corner strength, making this box suitable for stacking 3-5 units high in warehouse environments without crush risk.
Both the inner (T4448INNER) and outer (T4448OUTER) boxes are required to create the complete telescoping carton. They are sold separately, so you'll need to order both SKUs to assemble your full packaging solution.
This size excels for tall, narrow items: tubing (PVC, metal, cardboard), handles, rods, poles, rolled textiles, sports equipment, and specialty components. The adjustable height accommodation means you can use one box size for products ranging from 24" to 48" in length, reducing inventory complexity.
Technical Specifications
| Construction | Two-Piece Telescoping with Full Overlap Bottom |
| Sold As | Bundle of 25 Inner Boxes |
| Recyclable | Yes |
| Color | Kraft |
| Strength / Material | ECT-32 Single Wall Corrugated |
| Dimensions (Internal) | 4" × 4" × 48" (L × W × H) |
Shipping Information
Outer Carton Dimensions
4" × 4" × 48" (L × W × H)
Unit of Measure
BUNDLE
Qty Per Shipping Unit
25 PER BUNDLE
LTL Freight Class
Class 125
Delivery Method
Shown at checkout
Processing and delivery timelines vary by product, warehouse, order size, and destination. Freight-sensitive or oversized items may require LTL delivery or a custom quote before shipment.
Checkout shows available shipping options for the selected SKU and quantity. Use the shipping and refund policy links for current policy details before ordering.
For larger, recurring, freight-sensitive, or mixed-SKU orders, send the SKU or product link, quantity, delivery ZIP code, receiving notes, and timing to support@packrift.com.
ORDER SUPPORT
Product Support
Specs, case quantities, and availability are listed on each product page. For bulk, mixed-SKU, or LTL freight orders, email support@packrift.com with the SKU, quantity, and delivery ZIP.
Use product support for fit, larger or recurring order, return, or order-issue questions. When price and Add to Cart are shown, checkout remains the direct ordering path.
Need a sample, fit check, or substitution review? Contact product support with the SKU, selected option, order quantity, and use case. Support will confirm the available path for that item.
Contact product supportBuyer guides
Buying notes and spec resources stay here instead of taking space above the cart.
Use this product as the source
4x4x48 ECT-32 Kraft Telescoping Inner Box - Adjustable Design, 25-Pack
Related products
Shop corrugated boxes
Compare resources using the current product page data: SKU T4448INNER , type Boxes - Corrugated , sold-as unit BUNDLE / pack count 25 PER BUNDLE . Confirm the product page price, availability, and selected variant before ordering.
Compare inside dimensions, board grade, style, and bundle quantity.
Product support Use the box size calculatorUse this tool when item size, void fill, or storage space affects the carton.



