These zip-top bags are perfect for freezing, with a cold resistance of -40°C and heat resistance of 100°C. - Quantity: 10 sheets x 2P - Type: For freezing - Size: 170mm x 240mm - Cold resistance: -40°C - Heat resistance: 100°C - Material: Polypropylene Please understand that these have been stored at home. Only purchase if you are comfortable with this. Thank you for looking.