Chef Essential Extra large Teflon oven liners are covered by a lifetime warranty and are heat resistant to 500 degrees. Never clean the bottom of your oven again, our oven liners are easy to clean and require no elbow grease. Large Teflon Oven Liner. Measures a full 17" X 25" This material can be cut to size with household scissors. Also can be placed in the oven, Microwave. So Bake your "Charming Billy" those Cherry Pies without dreaded clean up with those toxic oven cleaners again! May be used hundreds of times Two (2) LARGE Teflon Liners included in this offer. Multiple Uses: Leave in the bottom of the microwave or oven and you'll be able to wipe away those burned on spills! Use it to cover microwave dishes during cooking Place under kids coloring or painting projects Roll out dough or anything sticky on it Place it under glue projects Fry on it, some top fast food chains line their griddles with it Re-Use it hundreds of times It has no taste or smell Avoid use with sharp objects or direct flame Non stick feature allows cooking without fats or grease letting your dishes be low in calories for Healthier Cooking or Baking and even frying! May come in either black or tan, same fine product just different color My kids have used it for sleding but I don't reccomend it! Too slippery! Warning: 1.Do not cover or block holes or vents inside the oven. Avoid direct contact with the heat element or open flame. 2.Don't use with aluminum foil. For optimum circulation, the oven liner must not touch the walls or door of the oven. 3.All Teflon and non-stick products are not recommended to those who have birds in their houses. Use this item may cause damage to your birds.