Bio Spot Active Care Spot On for Cats over 5 lbs, 3 Month Refill Kills fleas, flea eggs, flea larvae and deer ticks for up to 1 month Kills and repels mosquitoes that may transmit heartworm The Smart Shield Applicator, specially designed to make applying flea and tick control easier Available in 1, 3 and 6 month applicator packs* (* is not available in refill packs) Contains sesame oil to help condition coat