The Neptune 2" LPG meter is the worldwide standard for truck mounted metering. The aluminum body flowmeter comes complete and ready for installation. The 2" Type 4D MT meter for Liquefied Propane Gas features a flanged outlet with ductile iron companion flange for easy installation and removal. The 2" Type 4D MT is 33% lighter in weight than the old 2" Type 4D. Backed by Actaris's 3 year/3 million gallon measuring chamber limited warranty.