Hudson Heavy-Duty Polyethylene Commercial Backpack Sprayer with 20 in. Wand 4 gal. CapacityHudson presents to you this 4 gal sprayer that is indeed an excellent lawn sprayer. Convenient to use, this backpack sprayer has a locking large poly control valve that is comfortable and thumb operated. The extra large fill opening of this garden sprayer prevents spills when adding chemicals. The spray pump can have left or right handed pumping action. It has a bonus nozzle system with four different spray settings. The sprayer has a powerful piston