Roundup, 4 Gallon, Backpack Sprayer, Internal Pump That Will Not Leak On The User, Delivers 150 PSI, Ideal For Spraying Insecticides High Into Trees, Low Pressure Regulator Delivers A Continuous 25 PSI, Designed For Comfort With Thick Padded Straps, Waist Belt, Chest Strap & Lumbar Support, Deluxe Shut Off With Lock, Padded Grip & Filter, Built In Agitator For Constant Mixing, Fold Away Pump Handle With Locking Storage Strap, 3 Nozzle System Includes Adjustable, Flat Fan & Patented Foaming Nozzle, Viton O-Rings & Seals For Maximum Resistance Against Harsh Chemicals.