The material of the product is silicone. it is suitable for use in microwave, oven and refrigerator. it can be washed in the dishwasher. do not contact with fire directly. do not place it on a sharp object and do not use any sharp substance in the products. it is heat resistant up to 230 degrees. it is cold resistant up to -40 degrees. there are 2 of them. more than 50 stocks are offered to be sold at the campaign price. Improved version for clearer understanding and better search visibility. Suitable for users seeking detailed and reliable product information.