How grading works
Graders inspect four things: liner integrity, corner and edge squareness, crush or dents, and moisture history. Each box is sorted into A, B or C from those signals.
Consistent grading is what separates a reliable used-box supplier from a scrapyard — it lets you buy predictably.
Grade A
Like-new. Clean liners, square corners, no significant crush. Suitable for customer-facing shipping and demanding loads where used stock is acceptable.
Grade B
One to two prior uses with minor cosmetic wear but sound structure. The workhorse grade for internal handling, storage and most bulk uses.
Grade C
Economy stock with visible wear, best for light-duty, single-cycle or non-critical applications — or as feedstock for reconditioning and upcycling.