Universal Fit for Most Cooktops - Our stove safety knob covers fit almost all types of ovens or cooktops. The product's outer diameter is approximately 6 cm (2.36 inches), the height is approximately 4 cm (1.57 inches), and the bottom hole diameter is 4 cm (1.58 inches). Always measure your knobs before purchasing to ensure a correct fit. Heat-Resistant Material - The knob covers are made of durable, heat-resistant PP material and can withstand temperatures up to 120℃, maintaining their integrity and not obstructing your view of the temperature settings. Convenient Mechanism - Our child-safe stove knob covers are designed for adults to open, but impossible for children. They can be operated with one hand for easy use. The black and transparent design is very innovative and adds a splash of color to your kitchen. Tool-Free Installation - This package includes 8 child-safe gas stove knob covers. It comes with 8 pairs of strong adhesive. You can choose to use adhesive to attach the gas knob cover to the cooktop to prevent it from rotating. This simple installation provides an instant safety upgrade for your kitchen. Baby-Proof Gas Stove Knob Covers - Prevent infants or adults from accidentally turning on the gas, and also prevent pets (dogs or cats) from playing with the cooktop knob. By preventing children from being harmed by opening the cooktop (such as burns, causing fire, or gas poisoning), you can prevent infants or pets from grabbing the cooktop knob, which improves child safety. Note: This product can be used if the gas knob is less than 42 mm. If the gas knob is 42 mm, it is necessary to ensure that the knob panel is at least 8 mm above the countertop and that the total height of the knob is less than 40 mm to ensure that the knob can be pulled up and installed correctly. Measure the cooktop knob before purchasing, otherwise it may not work.