The stainless steel handle and ear make the wok much stronger, two layers of non-stick coating makes it easy to clean. 24x6cm,28x6.5cm,30x6.8cm 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 mirror polish surface outside, two layers of non-stick coatings inside, nice look, freely combine, easy ...