Capacity: 18L Pressure: 0.2--0.3Mpa Most comfortable backpack with thick padded straps, waist belt and lumbar support, internal piston style pump will never leak on backside of the user. Three nozzle system for precision application of chemicals, first you have your brass adjustable, second is the flat fan and the third is the patented foaming nozzle O-rings and seals offer maximum resistance to harsh chemicals.