Tired of losing lids or struggling with solid covers that don't let you see what's cooking? This 12-inch tempered glass lid is the solution you've been looking for! The outer diameter is 12.28 inches with an inner diameter of 11.73 inches, making it a perfect universal fit for most 12-inch cast iron skillets, frying pans, woks, and 7-quart Dutch ovens. The 4mm tempered glass is shatter-resistant and can handle heat up to 400°F, so no worries about thermal shock. The steam vent at the top is genius - it releases just enough pressure to prevent boil-overs while keeping moisture in for better cooking. You get TWO heat-resistant Bakelite handles with screws and a mini screwdriver for easy installation (takes about 60 seconds), plus a heavy-duty cleaning brush that's perfect for getting into the steam vent and other tight spots. The glass is dishwasher safe for easy cleaning, and being able to actually see your food cooking without lifting the lid is a total game-changer. Whether you're simmering sauces, frying, or stewing, this lid makes cooking so much easier and more enjoyable. It's one of those kitchen upgrades you'll wonder how you ever lived without!