Powered by Max Banner Ads Kills 98% of existing fleas in less than 24 hours. Continues killing fleas for an entire monthor more. Remains waterproof for 30 days, even if your pet swims or is bathed. Active Ingredients Fipronil And S-Methoprene For Dogs And Puppies 8 Weeks Or Older Up To 22lbs. Dimensions (L...