Our Bamboo Steamer Liners are made of 100% food grade pulp, non-stick, non-toxic, safe and sturdy. FDA approved. learn more about features: 9in pre-cut - save your time and reduce waste to cut circles & holes with knife. Make it easier to remove food, keep your food nice look and tasty. Clean up easily, keep bamboo tray free from food residue. Heat Resistant up to 450 degree F (230 C) for up to 20 minutes. Designed with holes to aid steaming, allows for steam circulation. Multi-functional cooking mat Ideal for 5.3/5.8 qt air fryer. Also can be used in steaming basket, cooking fish, vegetables, rice, dim sum, etc. How to use? Preheat the air fryer (do not preheat the air fryer paper together). Put the appropriate size steamer paper into the air fryer. Put the food you want to make on top of the air fryer paper, use food should not be placed too little, to avoid because of light weight, hot air blow the paper tray to the heating duct element to cause problems.