Universal One Lift-Off Lid File Storage Box, Letter, Fiberboard, White, 12/CartonDouble-walled construction on all panels increases stacking and carrying strength. Designed to stack two on a shelf. Smooth rolled edges eliminate paper cuts. Large tote handles for portability. Box Style: General Storage; Box Type: Easy Assembly; Material(s): Corrugated Fiberboard; Strength: Medium-Duty.