Kills Norway rats, roof rats, warfarin-resistant Norway rats and house mice. For use in and around agricultural buildings only. Pests may consume a lethal dose in one single night's feeding with first dead rodents appearing 4 or 5 days after feeding begins. Treated with S-methoprene to protect the bait from infestation by insects. Contains 2 oz chunks. Includes the active ingredient bromadiolene.