Uline Model Cross-Reference: Find the Equivalent Box or Mailer by S-Number

How to cross-reference a Uline model number

Uline model numbers (S-4125, S-18344) identify a size and board grade, not a brand of box. A 12x12x12 32 ECT kraft RSC carton is the same spec whichever supplier makes it, so the cross-reference works in three steps:

1. Read the S-number off the invoice line and find it in the table below, or type it in the search box. Each row lists the inside dimensions and the pack quantity, so you can confirm it matches what you have on the shelf.
2. Check the grade and construction. The product title in the table states the board grade (ECT-32 for the corrugated lines), the material, and the construction, so a white box, a multi-depth box, or a spiral-wound tube is never silently swapped for a standard carton.
3. Open the Packrift product page and compare the price per box at your quantity, then run the cart to see the freight line to your ZIP. Judge the switch on delivered cost, not sticker price.

Browse by product line

• 32 ECT Boxes (233)
• Flat Boxes (193)
• Long Boxes (103)
• Multi-Depth Boxes (59)
• Side-Load Boxes (6)
• White Boxes (33)
• White Easy-Fold Mailers (7)
• White Bubble Mailers (10)
• Gold Kraft Bubble Mailers (10)
• Poly Bubble Mailers (1)
• Kraft Mailing Tubes (63)
• White Mailing Tubes (34)

32 ECT Boxes (233 models)

Flat Boxes (193 models)

Long Boxes (103 models)

Multi-Depth Boxes (59 models)

Side-Load Boxes (6 models)

White Boxes (33 models)

White Easy-Fold Mailers (7 models)

White Bubble Mailers (10 models)

Gold Kraft Bubble Mailers (10 models)

Poly Bubble Mailer (1 model)

Kraft Mailing Tubes (63 models)

White Mailing Tubes (34 models)

Cross-reference questions

Uline is a registered trademark of Uline, Inc. Packrift is not affiliated with Uline; model numbers are referenced for size-compatibility comparison only.