DIMENSION: Please measure your stove knob before purchasing, otherwise it may not be usable. SCIENTIFIC AND SAFE DESIGN: Parents can easily open the buckles, but it is difficult for children, helping to prevent accidents before they happen. WHY IS IT NEEDED: Prevent children from opening the stove and hurting themselves (e.g., burns, causing fire, or poisoning), prevent children from pulling the damper and losing them. It can also be used on oven knobs. MATERIAL: High-temperature resistant PC+ABS material ensures product quality and longevity. UNIVERSAL SIZE: Our products are applicable to most gas stove knobs. White color Size: Inner circle diameter 1.9 cm Inner circle diameter of the outer wall is 5.9 cm Thickness of the base 0.16 cm Transparent cover height 3 cm Quantity delivered: 4 pieces Product dimensions are all measured by hand, there are errors, and the actual product shall prevail. Product color is affected by shooting light view, and there is a slight color difference, which depends on the actual product received.