Solo 475-B-DELUXE Professional Diaphragm Pump Backpack Sprayer, 4-Gallon, Bleach Resistant Pump Assembly Extra large carrying handle with wand retainer for easy portability and storage High-performance diaphragm pump for use with wet table powders, liquid formulations and bleach solutions Durable professional grade brass adjustable nozzle and 4-nozzle assortment Deluxe shoulder straps and waist belt for user comfort Adjustable pressure regulator with four positions: 15, 30, 45, 60 psi Fold-away handle with wand retainers for convenient storage, easily reversible for left or right-hand operation.