1.Each pan is made of three layers stainless steel,the detail material is 430s/s+1050aluminium+304stainless steel. The first layer : Stainless iron 430 can transfer heat all around the wok quickly. The second layer:1050aluminium can form a buffer zone which will transfer the heat around the pan symmetrically ,to make sure the constant temperature of the pan and avoid such problems as food are charred ,viscid ,stickly .At the same time ,for the perfect heat accumulation ,we can cook 1-2 dishes using the heat leaving on the body of the oan ,which can save energy and time . The third layer:lStainless steel 304 can save oil and bear acid and alkali. Both the colour and lustre of food are burnt to a turn. And it keeps the primary flavour.It is food grade. 2.Handle: Stainless Steel handle being inlaid with Cilica Gel is more confortable being held. 3.Cover: The cover is comprised of stainless steel and toughened glass, which partly looks more grand and luxurious. 4.This cookware sets include one wok ,one frying pan ,one sauce pan and one milk pan . the frying pan size :20cm 22cm 24cm 26cm 28cm the sauce pan size :18cm 20cm 22cm 24cm 26cm 28cm the milk pan size :14cm 16cm 18cm 20cm. the wok size :30cm 32cm 34cm 5.Package:three pans in one colour box and four colour box in one carton. 6.we can pruduct the products as to the cusumer's need, including the size , the colour box and the brand .