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. new and high quality and a healthy way to smoke cigarettes, reduce the risks of diseases brought by smoking. Model: DS-300 Size: Single length 30MM Diameter 10MM Material: Resin In the title and , we have provided the details of the product, including its features and specifications, please pay attention to the size and dimensions of the product to ensure that it meets your needs. We want you to be completely satisfied with your purchase, so if you have any questions or concerns, please feel free to contact us. We are here to help and will do our best to help you.