The Double Barrel Extension Sprayer is made to be used with the Chemical Resistant Pressure Sprayer. The pressure produced by the sprayer delivers a powerful stream of cleaner down the wand through the twin barrels. The barrels can work together or separately, and they're completely adjustable. Reach farther (in any direction) with the adjustable Double Barrel Extension Sprayer. 12 inches Chemical Resistant Pressure Sprayer sold separately.