Described as shockingly sturdy bakeware, this tempered glass baker is designed to bake casseroles and lasagnas to perfection, bubbling with family favorite flavors. The surface is so smooth that it cleans easily, even when food is baked onto the dish. OVENCHEF range is made from reinforced tempered glass resistant to a thermal shock of 200°C / 392 F temperature differentiation and is able to withstand temperatures between -20°C/ -4 F and 300°C/ 572 F.