"Regulator Bak-Pak sprayer regulates pressure to reduce chemical waste. 4-gallon capacity. U.S.A. Dimensions L x W x H in. 8 x 16 x 26, Seal Type Viton, Spray Pattern Fan, Wand Length in. 18, Sprayer Type Backpack, Tank Size gal. 4, Pressure PSI 75. CF Valve maintains 21 PSI and shuts off flow when pressure drops No-Leak uni-body contoured tank design Kem-Oil braided power sprayer-style hose Seals for maximum chemical resistance Strong 18in. curved brass spray wand with brass Tee-Jet fan nozzle Filler filter keeps out debris Left- or right-hand pumping Padded straps Large comfortable poly Thrustless control valve with in-line filter"