Storm Ultra is a single feed rodenticide based on Flocumafen and is the perfect solution for controlling rats and mice. Proven ability to deliver a lethal dose in a single feed. Rodent death will occur 4-10 days after ingestion. The product should be placed in areas where rodent activity has been previously seen. Avoid contact with surface waters and store in a dry, cool and well ventilated place. Keep the container closed and away from direct sunlight.