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The Solo manual 4-gallon 60 psi high-pressure backpack sprayer features an ultraviolet resistant tank, felt padded polyester straps, a heavy duty pressure cylinder and reversible pump lever. The high pressure backpack sprayer is made of all high-grade, corrosion resistant plastic, with no metal or rubber parts made vulnerable to chemicals. The chemical backpack applicator includes a connecting rod actuated piston pump to produce a wide pressure range up to 60 psi, 4-foot high pressure hose, a spray tube of 55 cm, and can carry up to 12 pounds. With its easy operating shut off valve, durable plastic parts, and 4-1/4-inch opening, it can handle disinfectants, fertilizers, herbicides, and pest control products for efficient tree, shrub, and plant protection.