4x4x37" White Corrugated Square Mailing Tubes - No-Roll Design, 50-Pack
$135.60
/ bundle of 50$2.71 per mailer
Request bulk pricing
Ships from the nearest of 5 US warehouses · freight calculated at checkout
30-day returns on stock items · Return policy
Inside dimensions
4" × 4" × 37"
Board / material
ECT-32-B Corrugated
Color
White
Freight class
Class 125
Specifications
| Inside dimensions | 4" × 4" × 37" (L × W × H) |
|---|---|
| Board / material | ECT-32-B Corrugated |
| Color | White |
| Sold as | Bundle of 50 |
| Order in multiples of | 50 |
| Bundle weight | 30.3 lb |
| Outer carton (shipping) | 48.25 × 22.0 × 5.75 in |
| LTL freight class | Class 125 |
| GTIN | 848109036083 |
| SKU | M4437 |
About this item
SKU M4437 — 4" × 4" × 37", ECT-32-B Corrugated, White. Sold as a bundle of 50, shipped from US warehouses.
Common questions
Why choose square tubes instead of round mailing tubes?
Square tubes prevent rolling during transit and storage, reducing packing time and damage risk. They stack efficiently in shipping cartons without requiring dividers, lowering per-unit fulfillment labor costs. For automated picking systems, square geometry integrates directly with conveyor-based sorting.
Is assembly required, and will it slow down my packing operation?
No tape or glue needed, tubes fold and lock together in 3-5 seconds by hand. Teams can assemble 500+ tubes per hour with minimal training, making these ideal for high-volume fulfillment centers and seasonal scaling.
Does ECT-32-B corrugated meet carrier durability standards?
Yes. ECT-32-B (Edge Crush Test 32 lb/in) exceeds ISTA 2A standards for small parcel carriers including UPS, FedEx, and DHL. Your contents remain protected even when tubes are stacked or palletized during multi-leg shipping.
What's the cost advantage of buying in bundles of 50?
Bulk ordering reduces per-unit costs by 20-35% versus smaller quantities. At 50 tubes per bundle, you'll reduce reorder frequency, lower shipping-in costs, and improve inventory turnover while maintaining fresh stock for just-in-time fulfillment.
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.