Create perfectly baked cakes every time after you add this invaluable tool to your kitchen. The Wilton heating core helps ensure even baking in the centers of large or deep cakes. Great for any cake you're worried may need some help cooking in the center. Details: 3.5" x 3.25" Aids in even cooking of deep or large cakes Aluminum Hand wash in warm, soapy water before each use; do not put in dishwasher