BPA FREE Made of food grade crystal polystyrene. Cigarette filters installation onto any cigarette to block/bar all tar and chemicals,effective flitering tar. Reduces most of the tar and nicotine in the cigarette smoke while you can still enjoy the full, unchanged flavor of your favorite cigarettes Every single holder is suitable at most 3 cigarettes. Stop using before the tar leaking out. When shopping, please pay attention to the size and dimensions of the product to ensure that it meets your needs. In the title and , we have provided detailed information about the product, including its features and specifications We want you to be completely satisfied with your purchase, so if you have any questions or concerns, please don''''t hesitate to contact us. We are here to help and will do our best to assist you. Thank you for choosing our product. We hope you enjoy it