Goplus 2-1/2 Gallon Pressure Pot & Spray Gun with Hoses, Pressure Tank Paint Spray Gun Tank Capacity : 2 1/2 Gallon (10 Liter) Tank size: 9.4" D x 10.2" H Standard 1/4" NPT connection;Optimal operating pressure:40 PSI Air Consumption: 6.0-8.8CFM Operating Pressure: 3.0-4.0bar