Royal 1/4, 1/3 Pan Steam Pan Liners with Twist Ties, Package of 250 WITHSTANDS HEAT: These steam pan liners can withstand heat up to 220 degrees Fahrenheit. They are not for use in appliances or environments higher than 220 degrees Fahrenheit. They are made from high density polyethylene. PROLONG THE LIFE OF YOUR PANS! Using an steam pan liner helps to ensure that food will not burn, scorch, or bake onto the pan surface. Proper use and cleaning of any dish will help maximize its lifespan. SAFE FOR MULTIPLE APPLIANCES: This item is ideal for use in slow cookers or steam tables. They are also freezer to oven safe. This product measures 14" x 18". EASY CLEAN UP! Using a high heat oven pan liner results in reduced cleaning time! By lining your pans, slow cookers, and other dishes with a high heat liner, the mess stays in the liner, not in the dishes. There is no need to scrub pans and slow cookers when using these bags! After cooling, the liner with the leftovers can be removed from the pan, and tied to be disposed of or preserved. Perfect item for restaurants, cafeterias, and diners! DISPOSABLE: This item is intended to be used one time only. After cooking, let contents cool enough to safely handle. Then, remove the liner from its pan, slow cooker, or steamer and discard appropriately.