Material: Crystalline polypropylene plastic and polypropylene are harmless to human health and environmentally friendly. Each filter can retain 25.7mg of dry tar for smoke to protect the health of your family and loved ones. Preserving Health: new and high quality. A healthy way of smoking cigarettes reduces the risk of smoking-related diseases. Tar, phenol and other kinds of effective harmful substances give you and others a healthy and clean environmental science. Size: Length is 3cm and the diameter is 0.4 inch, suitable for general cigarette. Each filter is suitable for 4 to 6 cigarettes. Stop use before the tar comes out. Away from children. Function: Cigarette filters slide over each cigarette to block all tars and chemicals. They absorb almost 90% of the tar and reduce nicotine as well as cough and dyspnea. A smoker does not detect any change in the taste of the cigarette, because it is a mechanical cleaning at smoke. Enjoy smoking yourself and a good gift for yourself and your friends. Product name: cigarette filter Size: 30mm Capacity: 100 pieces Package includes: 2*100* cigarette filters