EnviroSafe Arctic Air, Charging Gauge, 12 Pack Automotive Refrigerant Support

Removes moisture in the A/C system to prevent corrosion and freezing Reduces friction in the system and provides colder air duct temperatures Compatible with any automotive refrigerant except ammonia and CO2 Drying agent to extend the life of your A/C system Provides colder air for improved cooling performance Gas propelled for easy installation, just like adding refrigerant Cannot be added to a fully charged system