The CalGaz DFR 2008 Calibration Gas Demand Flow Regulator is a precision tool designed for accurately controlling the flow of gas in a range of 0 to 3 LPM. Made in the United States by the reputable brand CalGaz, this regulator is ideal for businesses and industrial applications requiring precise gas flow measurement. Its reliable performance and adjustable settings make it a valuable asset for ensuring accurate results in various gas detection and monitoring applications.