Six jets w/3 on-off valves to control the jets and built-in dilution air flowmeter; aerosol flow rate per jet: 6.5 liter/min at 170kpa 12l/min at 380kpa; mean droplet diameter: 2.0um for water 0.8um for dop; geometric standard deviation: less than 2.0; norm oper press: 170kp (25 psi); max inlet press: 550kpa(80 psi); max outlet press: 410kpa(60 psi)