Generous four gallon capacity. Can be used to spray pesticides, herbicides, fertilizers, cleansing solutions, game repellents and more. Can be preset to four different psi settings - 15, 30, 45 or 60. Four inch tank opening makes it easy to fill. Hand pump can be adjusted for right or left handed use. Includes fan, cone and straight steam nozzles. Padded adjustable shoulder straps and steel frame for support. Your choice of two models: Model 425 - Piston Pump - recommended for liquid chemicals only. Model 475 - Diaphragm Pump - can be used with liquid or powdered chemicals. Replacement parts available. Call for list. $86.95Model: 425 Piston475 Diaphragm Five Gallon Solo Backpack SprayerSame features as above with a five gallon capacity. $93.95Model: 435 Piston485 Diaphragm Multi-Purpose Low Pressure Gunjet 30LCan be used with the Solo Backpack Sprayer. Maximum pressure rating of 250 psi. Made of durable nylon with brass fittings. Comes with three nozzles (.0001, .0002 and .0003). Features viton o-ring seals which resist chemical damage and prolong gun life. 30L$45.95 Need more information? Please feel free to contact us at 1-800-592-6940 - Ask for Extension 547 or Internet Sales.