Controls Norway rats, roof rats, and house mice. Moisture-resistant pellets. 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. 20 gallon plastic bucket contains (15) 4 Lb. resealable pouches of product. Active Ingredient: Diphacinone.