No more premixing chemicals or wasting what you don't use! This M.O.E. backpack sprayer holds water and concentrate in separate tanks, and they only mix during spraying. The main water tank offers a 6' dia. wide-mouth opening for easy filling, a filter basket to keep out debris and a removable filter to reduce clogging. The removable concentrate tank uses a simple ratio dial to accurately customize your mix from 1 to 10 oz. per gallon. Two concentrate tanks are included, allowing you to easily switch between using weed killer around your fence line to applying liquid fertilizer to your garden and flower beds. The manual pump handle mounts to either side to accommodate right- or left-handed users. Chapin 63950 4-Gallon Mixes on Exit Backpack Sprayer