1. Material: Silicone 2. Size: 6x0.8cm 3. Purpose: Anti-fog 4. Scope of application: masks, glasses 5. Matters needing attention: If the product has surface dirt or the like, it is normal. Some of the abrasive tools come with them when they are produced, or they are glued on by workers when they are produced; buyers who do not accept it, please be careful
