5x5x18 ECT-32-B White Square Mailing Tubes 25/Bundle M5518
$78.68
/ bundle of 25$3.15 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
5" × 5" × 18"
Board / material
ECT-32-B Corrugated
Color
White
Freight class
Class 125
Specifications
| Inside dimensions | 5" × 5" × 18" (L × W × H) |
|---|---|
| Board / material | ECT-32-B Corrugated |
| Color | White |
| Sold as | Bundle of 25 |
| Order in multiples of | 25 |
| Bundle weight | 11.36 lb |
| Outer carton (shipping) | 31.25 × 27.0 × 3.0 in |
| LTL freight class | Class 125 |
| SKU | M5518 |
About this item
SKU M5518 — 5" × 5" × 18", ECT-32-B Corrugated, White. Sold as a bundle of 25, shipped from US warehouses.
5x5x18" white mailers in paper stock, packed 25 per bundle (SKU M5518); this is a second listing of the same BOX case stock at the same price.
Sized for shipping and fulfillment work; closes with tape or the built-in flap. Order by the bundle of 25.
Common questions
Why choose square tubes over traditional round mailing tubes?
Square tubes eliminate rolling during packing and storage, reducing damage risk and pack time. Their flat-stackable design uses 40% less warehouse space and prevents misalignment on conveyor systems, critical for high-speed fulfillment operations.
How quickly do these tubes assemble without tape or glue?
Operators can fold and secure these one-piece tubes in under 10 seconds per unit, with the interlocking flaps holding contents securely without additional adhesives. This dramatically accelerates fulfillment workflow and reduces material costs.
Is ECT-32-B corrugated strong enough for heavy items?
Yes. ECT-32-B (Edge Crush Test 32 lbs/inch) provides robust protection for items up to 30 lbs, meeting carrier crush-resistance standards for most commercial shipping applications without requiring reinforcement.
Can these tubes be customized or printed with branding?
Standard white tubes are ready-to-ship as-is. For custom printing or branded options, contact our account team for volume pricing on white label production, typical minimums are 500-unit orders.
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.