LTL CO2GEN 10 burner, natural gas, high altitudeThere are 2 distinct types of LTL Controls 10 Burner CO2 Generators available, those for Propane and those for Natural Gas. You can then choose between High Altitude (above 5,000 ft) and Low Altitude (below 5,000 ft) models of each. All generators come with the correct regulator and hose, along with pre installed, clean burning brass burners. Both units are equipped with features like a safety tip over switch, which automatically turns off the unit if