1. Weight: about 16g/box (2pcs/box) 2. Size: about 9.5x2 cm/box 3. Material: plastic 4. Filtration method: microporous filtration 5. Function: effectively filter tar, nicotine, carbon monoacid and other carcinogens in cigarettes, relieve symptoms such as sputum and shortness of breath caused by smoking, and significantly reduce dental smudge 6. Features: thick and thin dual-purpose type, healthy material, non-toxic and harmless, easy to use, can be cleaned and recycled
