*** ship out BEFORE CNY YuanYang Pot Set - Include one pot, one lid, one soup spoon and 2 filter spoon - Size: 32cm - Premium quality, thick stainless steel, - Induction ready, suitable for 4-8 pax As it's using welding techniques, there might some welding marks on the divider. It's not defect or rusty. It's heat tint. Heat tint is the result of the oxidation that can occur when welding stainless steels. Heat tint can occur in the weld metal and also in the base metal in the area that surrounds the fusion zone. There's no evidence that heat tint has negative impacts for human's body. You can refer to this page for how to remove slight heat tint - https://madeincookware.com/blogs/beyond-the-burner/the-dreaded-rainbow-stain-and-how-to-fix-it