Material: Crystalline polypropylene plastic and polypropylene are 100% 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