Reviews Description: Frontline flea and tick treatment spray-on topical flea control formula can be applied directly to pets to provide fast-acting control of fleas and ticks for up to 30 days. Spray bottle is easy to use, ensures fast and even application and can be reapplied regularly. Kills fleas before they lay eggs, effectively preventing reinfestation. Contains fiprinol to kill pests quickly and safely. Safe for dogs, puppies, cats and kittens 8 weeks or older. Frontline spray is available in the sizes listed below. Comes in 8.5-ounce. Active Ingredients are fipronil: 0.29-percent, inert ingredients 99.71-percent, total 100.00-percent. Measures 7-inch length by 2-1/2-inch width by 2-1/2-inch height.