USES: Injection Sprayer FEATURES/BENEFITS: Increases speed and efficiency. Requires no pumping. Requires no electric cords. Applies chemicals hot. Requires no mixing or waste. Has 2 main moving parts. Is highly reliable. Connects to your pressure line and automatically draws concentrate from the 5-qt containter to achieve your desired dilution ratio. OTHER INFO: 250 to 1,000 PSI, this model has a metal gunjet.