Product Details: The Roundup 4 Gallon No Leak Pump Backpack Sprayer does the work of a piston or diaphragm backpack sprayer. The exclusive internal No Leak Pump keeps your back and clothing dry. The backpack lawn sprayer paddles keep liquids, powders, and water-soluble solutions mixed, in solution, and ready to spray. Adjustable padded straps, waist belt and chest cinch strap for comfort Includes 4 nozzles; poly adjustable nozzle (enables stream to cone patterns), wide flat fan nozzle (0.25 GPM and angled at 70 degrees), narrow flat fan nozzle (0.15 GPM and angled at 30 degrees), and foaming nozzle Backpack sprayer is compatible with TeeJet nozzles Foldable pump handle reverses for left or right-handed use Tank with built-in carry handle and wand storage Pressure regulator maintains low and continuous 25 PSI Great for spraying herbicides and weed killers Capable of spraying up to 150 PSI for hard-to-reach areas Premium shut-off offers comfort grip Lockable trigger to prevent hand fatigue Removable in-line filter to reduce clogging Viton seals can easily be changed within minutes without tools Paddles keep liquids, powders, and water-soluble solutions mixed, in solution, and ready to spray Exclusive internal no-leak pump keeps your back and clothing dry