1.Polycarbonate (PC) is one of the engineering thermoplastic materials most commonly used and most widely tested in the medical device industry today. Its inherent strength, excellent optical clarity, high heat distortion temperature, and dimensional stability make it an ideal material choice for demanding, critical care applications. 2.Solid Bottom Use in the refrigerator or kitchen cabinets underneath those leaky or sticky containers. Under the toaster, Under the Coffee Maker, Endless Uses. Use Waffle Grids under potted plants to contain overspill or drainage. 3.Contains 4 Grids each measuring 11.25' X 11.25' 4.Material is of impact resistant polycarbonate plastic. (Lexan) Dishwasher Safe Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-DIMEANI official store