High quality materials facts of stainless steel instead of plastic avoid the presence of harmful substances in their food, allow hygienic cooking, can be washed in the dishwasher and are easy to clean. 4 sizes, 20 cm, 22 cm, 24 cm, 26 cm, size can be selected according to the size of the pot, and a clip is appropriate. High quality stainless steel with small holes has a uniform effect on Heat, keeps nutrients and natural flavor intact, is to the proof of rust and is not easily deformed