Thank you for viewing. Earth Pet Medicated Flea & Tick & Mosquito Repellent Collar Pink For Cats, 35cm, Set of 2. Thank you for your understanding. Protects your pet from ticks, fleas, and mosquitoes! The effect starts to appear in about a week and lasts for about 6 months. Not only does it effectively eliminate ticks and fleas, but it also repels mosquitoes. Contains phenothrin, which has excellent insecticidal effects and residual action, and pyriproxyfen (IGR/Insect Growth Regulator), which has been confirmed to be safe for humans and animals. Ingredients: Phenothrin (pyrethroid), pyriproxyfen (diphenyl ether). Since it is stored at home, there may be scratches and stains on the outer box.