ViagrowTM Co2 Regulator 05-15 SCF Compatible with most 120V timers and controllers Flow Meter Accuracy from .5 to 15 SCF per hour Features a heavy duty solenoid valve, solid brass construction, and an oil free pressure gauge for years of trouble-free use Includes 6 120V power cord, replacement connection washers and 16 feet of CO2 dispensing line 3 year warranty