This is kettle lid whistle knob, which is made of stainless steel, ABS and copper material, durable for long lasting use.It will make a loud whistle to ensure that you can hear it from another room when the water boils. Suitable for most whistling kettles cover, which ensure its practicality and popularity. Features -Color:As Shown-Material:ABS,stainless steel, copper-Size:4.20X3.10X2.30cm/1.65X1.22X0.90in (knob)-Size:1.60X0.40X0.40cm/0.63X0.16X0.16in(screw) -Size:3.50X3.50X0.40cm/1.38X1.38X0.16in(base) -Size:3.30X3.30X0.10cm/1.30X1.30X0.04in(whistle gasket) -Size:5.50X5.50X0.50cm/2.16X2.16X0.20in(gasket ) - Thekettle lid whistle knob set is made from stainless steel,ABS and copper materials for excellent durability.- The texture is delicate, without burrs, comfortable hand feeling, safe and reliable. - Easy to remove and simple to install, more convenient for you to add and pour water. - A perfect whistling kettle lid knob for replacing the old or broken one. - Simple but practical, they are great kitchen gadgets for bringing much convenience to you. Packing list: 10 x knobs10 x bases10 x screws10 x gaskets10 x whistle gaskets