18" x 26" Food Box Clear Lids are manufactured from clear polycarbonate for visibility and stain resistance; white polyethylene for more economical storage and transport. Tight-fitting, snap-on lids double as bun pans or cold food trays. Dishwasher safe and freezer safe. Easy-grip handles and Mark-It-Fresh date control panels on boxes and lids for inventory control. NSF Certified.