Low Pressure Gauge for Propane Regulator 0-40 psi - 2.5 inches 0-40 psi pressure gauge for Propane/Propylene/LPG regulator For its use in the low pressure side of the Propane/Propylene/LPG regulator 2.5 inches easy to read dial in PSI and KPA pressure units Chrome plated steel case and sturdy construction 1/4" NPT buttom inlet connector fits most common regulators