Denby Cast Iron Oval Covered Casserole, 4.2-Liter, Blue Thinner Walls that Heat up Quickly and Retain Heat Longer Resulting in Less Energy Use Oven Safe up to 485F, Suitable for All Heat Sources; Thermal Shock 392F Excellent Heat Retention with No Hot Spots; Self Basting Rings Create a Continuous Basting Cycle Dishwasher safe Lifetime Warranty