Good fit for shipments or presentation packs where the product fits the listed inside dimensions and closure style. Confirm inside dimensions, board type, closure, color, and whether the item needs extra cushioning.

Best For
How to choose
Specs at a Glance
| Material | ECT-32-B White Corrugated |
| Dimensions | 43" L x 3" W x 3" H |
| Configuration | One-Piece Flat-Ship Design |
| Bundle Quantity | 25 Units Per Bundle |
| Recyclable | Yes |
Common Use Cases
- Packing small ecommerce orders, kits, samples, gifts, documents, or parts in a folding mailer box.
- Standardizing a branded or unbranded mailer-box size for repeat shipments.
- 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 25 Pack. Check the current product page for variant details, price, availability, and pack count before checkout.
Shipping & Packaging
Frequently Asked Questions
Square tubes eliminate rolling and shifting during shipping, reducing product damage and packing time. They stack efficiently in boxes and vehicles, lower dimensional weight charges, and pack faster without requiring tape or glue, cutting assembly costs by up to 40%.
ECT-32-B is an edge crush test rating of 32 pounds per inch, indicating strong stacking strength and durability for protecting contents through multiple handling and transport cycles. It's ideal for heavy documents, rolled materials, and repeated shipping.
No tools, tape, or glue required, simply fold the one-piece design together in seconds. A single worker can assemble 200+ tubes per hour, making bulk shipping operations significantly faster and more cost-effective.
Yes. The 43" length complies with UPS, FedEx, and USPS length restrictions, and ECT-32-B construction meets carrier durability standards for ground and express shipping without additional reinforcement.
Technical Specifications
| Configuration | One-Piece Flat-Ship Design |
| Bundle Quantity | 25 Units Per Bundle |
| Recyclable | Yes |
| Color | White |
| Strength / Material | ECT-32-B Corrugated |
| Dimensions (Internal) | 43" Γ 43" Γ 3" (L Γ W Γ H) |
Shipping Information
Outer Carton Dimensions
43" Γ 43" Γ 3" (L Γ W Γ 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
43" x 3" x 3" White Square Mailing Tubes ECT-32-B Corrugated - 25 Pack
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Compare resources using the current product page data: SKU M3343 , type Boxes - Mailers , sold-as unit BUNDLE / pack count 25 PER BUNDLE . Confirm the product page price, availability, and selected variant before ordering.
Compare usable size, padding, material, closure, and case quantity.
Product support Compare mailer vs boxUse this guide when item thickness or edge protection affects fit.



