For RESCUE! Reusable Fly Traps – This bait refill is compatible with RESCUE! Reusable Fly Traps. It attracts many varieties of common nuisance and filth flies. Attracts Flies Fast – This attractant quickly lures common fly species, including house flies, cluster flies, blow flies, bottle flies, and many others. Easy to Use – Just drop the water-soluble pouch into the trap container, add water to the fill line, replace the top, and hang or place the trap outside near a fly source. Outdoor Use Only – Once activated, this bait has a strong odor. Only use this trap outdoors, and at least 20 feet away from any living areas. Made in the USA – At RESCUE!, our goal is to design and manufacture the safest and most effective pest control solutions available. We proudly manufacture our products in the USA!