Never pump again. Professional and commercial spraying operations can now save more time and money with the Green Gorilla® powered spray system. An innovative, rechargeable Power Pack connects easily to a premium spray tank and eliminates manual pumping by pressurizing the air within the system. The constant pressure also maximizes the use of chemicals. The Green Gorilla is available with 1.5- and 2.5-gallon tanks and is assembled in the U.S.A.