Tank capacity: 40 gal . Max. pump running pressure: 175 PSI at 80% duty cycle . Air delivery: 14.5 CFM @ 175 PSI 16.5 CFM @ 135 PSI 18.7 CFM @ 90 PSI 20.6 CFM @ 40 PSI . 1"NPT ball valve . 3 AMP battery charging circuit (battery not included) .Powdercoated tank finish .Engine: Briggs&Stratton 10HP,4stroke,OHV,gasoline .Displacement: 306 cc .Regulated charging system .Low oil shut down .Start type: recoil/electric. Contact Myron Miller with any questions 574-536-6306