For dogs 40 lb to 60 lb. 3 month supply. 4 week protection. Kills: fleas in as little as 1 hour; ticks in as little as 3 hours; mosquitoes. As with all flea and tick control products, Sergeant's Silver Flea and Tick Squeeze-On for Dogs should be used as part of a program aimed at reducing flea populations in the dog's environment (bedding, carpets, kennel, yard). Made in the USA.