Combining natural pyrethrins with a synergist and Permethrin in a water base, this formula has one of the lowest toxicity profiles and highest activity ratings. It is both safer to use and more effective. Residual activity up to 3 months after spraying. Can Size 20. 12 per case. The synthetic pyrethroid Permethrin is not an organo phosphate material like Dursban, Propoxur, or Diazinon. The high content of natural Pyrethrin provides effective knockdown and flushing action. Extremely versatile, this product is a dual purpose insecticide capable of effectively controlling both flying and crawling insects in residential, commercial, industrial, and agricultural settings. The long list of controlled species includes fleas on animals, lice and their eggs and many more. Also featured is a twin action valve and actuator for both mist and stream spray patterns for wide area treatment, space spraying and crack/crevice spraying without requiring special actuators or extension tubes.