◎ Product Size 　　　Inner diameter: Approximately 3cm 　　　Outer diameter: Approximately 3.8cm 1: Installation method: Adhesive tape 2: This type is applied to the start button. 3: The double-sided tape may be large or the adhesive may be weak. 4: The size may not fit depending on the vehicle model and year. Please refrain from purchasing if you are concerned about defects in the double-sided tape, imperfections in the manufacturing, or minor scratches.