Ready to use, pre-measured bait trays. Features rat killer with naturally derived, non-toxic ingredients that is safe if accidentally ingested by pets or wildlife. Also safe for birds of prey with no risk of secondary kill. Ideal for indoor or outdoor use to effectively kill unwanted rats and mice from industrial buildings, livestock premises, homes, barnyards, and more. Contains (4) 3 ounce trays. Active ingredient: Corn Gluten Meal.