Pyrex Silver 33Cm Oven Tray Warranty: This product is guaranteed for 5 years by international cookware against manufacturing defects. The warranty does not cover damage due to misuse or professional use. Staining, damages following notches in the coating or exposition to an excessive temperature, loss of non-stickiness due to wear are not covered under warranty. In case of difficulty in using the product, refer to the website www.pyrex.eu