Made of clear polycarbonate that is impact resistant and built to withstand temperatures from -40F to 212F, the Lid is smooth for fool-proof cleaning and has reinforced top and bottom corners to prevent cracking. The Lids also feature a date indicator on the side to allow for easy identification of contents and help meet food safety standards. The "lock-tight" Container Lid can also be used as a bun pan or tray when flipped for versatility and stacks with other storage containers for convenience. Dishwasher safe. - Polycarbonate; clear - NSF - Length 26 in - Width 18 in - Height 1-7/25 in - Sold per each ***CALIFORNIA PROP 65 WARNING: This product contains a chemical known to the State of California to cause cancer, birth defects or other reproductive harm.***