Controls Norway rats, roof rats, and house mice. Moisture-resistant 1/2 In. bait pellets. Packaged in ready-to-use bait packs that rodents gnaw open. This product may only be used inside and within 50 Ft. of buildings or inside of transport vehicles. Contains an anticoagulant rodenticide. Made with processing technology to produce a palatable and highly attractive fish flavored bait that retains its freshness, sweetness, and effectiveness even in difficult conditions. Weather resistant. Active Ingredient: Diphacinone. Type: Pellets Indoor/Outdoor: Indoor/Outdoor Active Ingredient: Diphacinone