Set sizes: Pots: 18 + 20 + 22 + 24 cm / Pans: 20 + 24 cm / Grill pan: 28. (Each pot with a lid) Material: Cast aluminum. Cast aluminum core provides exceptional durability with a light weight that does not exceed 1/3 of the weight of iron core. Ecolon ceramic coating provides superior non-stick performance and highly scratch-resistant durability. The silicone coated handle is effective for a soft, non-slip grip. (Pan) Steam vent under the lid prevents overflow. (For Pot) Contains no heavy metals such as lead and cadmium or toxic chemicals PFOA (Perfluorooctanoic Acid) and PTFA (Polyethylene). High resistance to corrosion. Thanks to its high thermal conductivity it provides high cooking performance and saves energy even at low temperatures. High scratch resistance. The outstanding performance of the non-stick layer prevents food from sticking when cooking. Easy to clean. Silicone and wood utensils are recommended to extend the life of the cookware. Healthy and environmentally friendly. Healthy cooking with less oil. Suitable for gas, electric and radiant stoves (ceramic stoves). Korean made.