3 Different Sizes for Your Choice - 4 pieces of small bags (6.3*6.5 inches), 4 pieces of medium bags (6.3*7 inches), 4 pieces of large bags (6.7*7.5 inches), meeting your various requirements for different food. High Quality - Made of glass fiber fabric as the base fabric, and the surface is infiltrated and coated with high-quality Teflon emulsion (PTFE). 100% gluten free, reduce chances of food cross contamination and allergic reactions. High Performance - Withstand the temperature from -70~260? / -158~500?, it even could withstand the maximum temperature of 716?. Non Stick & Reusable - Surface of the bag is very smooth, easy to clean. Bags could be used repeatedly for about 50~100 times generally. Your Health Is Our Priority - Made of food grade material, non-toxic and tasteless, will not affect the quality of food.