The SP818 backpack sprayer has a 2–piston pump powered by a 4–cycle air–cooled Robin engine. Pump is capable of delivering pressure up to 310 PSI. The 6.2–gallon polyethylene tank uses Viton seals and Nytril O–rings, and is designed for applying herbicides, insecticides, pesticides, fungicides and fertilizers. Can also be used to disinfect animals, stables, warehouses and more. Hose can be attached to either right or left side; unit can also be operated with two hoses simultaneously. Low center of gravity minimizes operator fatigue. Factory shipped.