Double color outside make the set has a nice look, with stianless steel bottom, can be used on electric oven. 16x7.5cm milkpan,20x9cm sauce pot,22x10cm sauce pot The non-stick coating we use is AKZO NOBEL from USA, we also use coating from South Korea, we have got FDA, LFGB certificates on health. The product is heat resistant surface outside, two layers of non-stick coatings inside, nice look, ...