The GREENWOOD 4 Gallon Backpack Sprayer is designed to water, fertilize, control weeds, control pests and apply sealers. This versatile backpack sprayer is constructed from durable polyethylene and comes with a convenient shoulder strap and a funnel top for fast filling. Whether working in the yard or remodeling the home, this 4 gallon backpack sprayer is the easy, fast way to spray.