The length of Cigarette filters is 3cm or 1.2" and the diameter is 1cm or 0.4", suitable for general cigarette. Each filter is good for 1 to 3 cigarettes. Stop using before the tar leaking out. Tar filters slide onto any cigarette to block or bar all tar and chemicals, it will absorb almost 90 percent of the tar and reduces nicotine.Can effectively filter the tar smoke, nicotine ancient and a carbon acid, etc., effectively relieve the symptoms caused by smoking, such as sputum, shortness of breath, significantly reduce the smoke on the teeth.Lessens damage to the gums. Tobacco Filter Tip Mouthpiece using laws of physics, contains no harmful chemical stuffs.A smoker does not detect any changes in the taste of the cigarette since the method used is mechanical smoke purification.Every filter may holdback 25.7mg dry tar for one piece of smoke, protecting your and you family's health, a healthy somking environmental science. Filters stay in mouth comfortably and food grade plastics prevents your fingers from getting discolored. Enjoy smoking by yourself and a good gift for you and your friends. Money Back Guarantee,disposable cigarette filters are backed by guarantee that you are fully satisfied with your product or receive your money back.