"Regulator Bak-Pak sprayer regulates pressure to reduce chemical waste. 4-gallon capacity. U.S.A. Seal Type Viton, Wand Length in. 18, Spray Pattern Fan, Dimensions L x W x H in. 8 x 16 x 26, Pressure PSI 75, Tank Size gal. 4. 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"