1.0mm ss 304 body,3.0mm ss 430 protector ·Filter eyelet in the sprout ·Filter net inside of Tea pot ·Sprout adopt welding process ·sillicon w/ss plate side&long handle ·silicon w/ss plate lid knob ·polished or brushed body ·Tea is brewed in the small teapot 1.0L, while water is boiled in the larger tea-kettle(2.0L) . ·Kettle is sturdy polished 18/10 stainless steel with heavy clad-core bottom. ·Teapot is 18/10 stainless steel. ·Dishwasher safe