DescriptionThese whistling kettle cover knobs are made of premium material, which can withstand the long-lasting use. Features the premium material, which has high durability, not easy to deform. Fine workmanship, it ensures the practicality. They come with simple structure, which offer you easy installation.Features-Color: Black, red -Material: Bakelite, stainless steel -Size: About 5.50X5.50X2.50cm/2.16X2.16X0.98inch -Manufactured by stainless steel and bakelite, safe and durable. -They will make a loud whistle to ensure that you can hear it from another room when the water boils. -They are simple and convenient installation knobs. -Suitable for most whistling kettles cover, which ensure its practicality and popularity. -Easy to use and install, suitable for professional and personal use.