12.25″/31cm Nonstick patented lid valve works like magic to open, release steam and prevent spillover. Prevent water, milk and soups from boiling over and making a mess. Ideal for pasta, eggs, vegetables, potatoes and more. Turn valve to “OFF” position to use as a regular lid. Fits pots and pans from 7.5″ to 12″ High heat resistant silicone to 465°F. Tempered glass insert in lid lets you monitor cooking. Easy to clean and store.