Stop wasting water, chemical concentrate, and your time with Mixes on Exit, Chapin's clean tank spraying system. We've taken the same innovative technology of our ATV sprayers and turned it into an easy-to-carry, 4-gallon backpack sprayer. The water tank is completely separate from the concentrate tank, and it only mixes when you're applying your chemical. It's designed around two tanks - a 4-gallon water tank and a 0.3125-gallon concentrate tank. Our 63950 M.O.E. backpack sprayer comes with two chemical tanks so you can use one and keep one handy when you need to switch. Fill your water tank, fill your chemical tank, snap the chemical tank into place, then set the dial to accurately dispense your concentrate. Along with the separate chemical tanks, additional features include padded backpack straps with lumbar support, cushion-grip shut-off with lock-on/off feature, and three nozzles to easily swap out based on your application. Additional concentrate tanks are available and sold separately. You can swap your chemicals out on the fly when you're on the job. Made in the USA with global materials and backed by Chapin's 2-year limited warranty.