Oven-safe Tempered Glass: Oven-safe up to 350-Degrees ° F make this sturdy replacement cover an essential part of your cookware accessories collection. Tempered glass can withstand drastic temperature changes and won't shatter under pressure. Tight Fitting Lids: Lock in steam and flavor with these universal sized replacement lids. Fits most 12"-inch skillet, frying pan, pot or sauce pan with an 6"" inch diameter rim. Stainless Steel Reinforced Rim: Stainless rimmed lid adds an additional layer of reinforcement to these already sturdy tempered glass covers - making them break-resistant and shatter-resistant - and provides a comfortable seal to lock in steam, flavor and splashes. Food-safe - Easy To Clean - Dishwasher Safe: Smooth construction eliminates any concern that foods might lodge anywhere in the lid. These heavy duty lids can be cleaned by hand or the dishwasher. No need to buy a whole new set of cookware if you lose, break or wear out your old lids