3x3x37" White Corrugated Square Mailing Tubes - No-Roll Design, 25-Pack
$36.42
/ bundle of 25$1.46 per mailer
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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
3" × 3" × 37"
Board / material
ECT-32-B Corrugated
Color
White
Freight class
Class 125
Specifications
| Inside dimensions | 3" × 3" × 37" (L × W × H) |
|---|---|
| Board / material | ECT-32-B Corrugated |
| Color | White |
| Sold as | Bundle of 25 |
| Order in multiples of | 25 |
| Bundle weight | 11.7 lb |
| Outer carton (shipping) | 46.25 × 17.0 × 3.0 in |
| LTL freight class | Class 125 |
| GTIN | 841436037365 |
| SKU | M3337 |
About this item
SKU M3337 — 3" × 3" × 37", ECT-32-B Corrugated, White. Sold as a bundle of 25, shipped from US warehouses.
The 3x3x37" White Corrugated Square Mailing Tubes - No-Roll Design, 25-Pack is a corrugated mailer for books, catalogs, apparel, subscription kits, samples, documents, and small e-commerce orders. Listed specs include inside dimensions 3" x 3" x 37"; white material; Bundle 25. The mailer format works when the product needs a presentation-style carton or compact shipping box instead of a standard RSC case.
Ideal for shipping posters, rods, artwork, banners, lighting, and rolled goods. A sturdy, reliable choice for small-business, Etsy, and ecommerce shippers.
Common questions
Why choose square tubes over round mailing tubes?
Square tubes eliminate rolling and shifting during transit, reducing damage claims and customer returns. They stack and pack more efficiently, maximizing pallet density and reducing shipping weight per order. For your warehouse team, square design means faster, neater packing, no more chasing round tubes across the shipping dock.
What is ECT-32-B corrugated, and is it strong enough for my shipments?
ECT-32-B (Edge Crush Test 32) is a medium-duty corrugated standard proven for lightweight to mid-weight rolled items like documents, textiles, and artwork. It provides excellent puncture resistance and compression strength while keeping material costs competitive, ideal for high-volume shippers.
How long does assembly take, and do I need special equipment?
No tools, tape, or glue required. Each tube folds together in 2-3 seconds by hand. Your team can assemble boxes at packing stations without slowing workflow, significantly reducing labor costs compared to traditional taped or glued alternatives.
Can these tubes accommodate items longer than 37 inches?
No, the 37" length is the internal dimension. For longer items, we recommend our 42" or 48" square tube options. Contact our packaging consultants to find the ideal tube height for your exact shipping needs.
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.