Description This is a kettle cover knob, which is manufactured with premium stainlsteel material, practical and durable enough to use.Automatic whistle design, the sound is clear and not harsh. It is compact and easy to install, which is the great choice for you.Easy to remove and install, more convenient for you to add and pour water. Features -Color:Black-Material:Stainlsteel-Size:5.50X5.50X2.50cm/2.16X2.16X0.98in-Manufactured by stainlsteel material, safe and durable. They are simple and convenient installation knobs. - They 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. - The product is easy to use and install, suitable for professional and personal use. - Fine workmanship, durable and sturdy, not easy to wear or tear, you deserve to have one. Package list: 4 x Kettle Knobs