This package contains two pheromone-based replacement lures, which attract pregnant female mosquitoes and other flying insects. These replacement lures are designed for use in the Oakstump Slim Mosquito Trap. Originally designed and tested for the Culex mosquito, they works well with many other mosquito varieties and some other flying insects. After 5 to 6 weeks, or if the trap becomes rank from dead insects, replace the water and add a new lure. Made in the USA. Contains 2 replacement lures. NOTE: Trap not included.