FOR RESCUE! YELLOWJACKET TRAPS – This attractant refill works inside any reusable RESCUE! Yellowjacket Trap. Two vials of attractant are enclosed, each lasting 2 weeks. WHAT IT CATCHES – This attractant formula lures queens and workers from all major yellow jacket species. If your target is wasps or hornets, consider our WHY Trap or TrapStik for Wasps, Hornets, and Mud Daubers. HOW IT WORKS – When used in conjunction with a RESCUE! Yellowjacket Trap, this attractant lures yellowjackets to fly or crawl into the trap. Once they are trapped inside, they dehydrate and expire. NO KILLING AGENT – Unlike potentially harmful chemicals and sprays, this attractant lures yellowjackets with a non-toxic mode of action. MADE IN THE USA – At RESCUE!, our goal is to design, manufacture, and market the safest and most effective pest control solutions available for homeowners. We are proud to manufacture our products in the USA!