Crafted from lightweight carbon steel to quickly bring water to a boil. Vibrant porcelain enamel is non-reactive, non-porous, and resists stains, rust, scratches and flavor absorption. Fixed single-tone whistle alerts when water has reached a rolling boil, and can be easily flipped open for pouring. Convenient markings inside kettles note minimum and maximum water fill levels. Black stay-cool folding handle, stainless steel knob and brackets ensure secure handling. Compatible with all cooktops.