Check the listing for details. Envirosafe Arctic Air for R12, Auto AC Support, 1 can and hose. Condition: New. Listed at 25.99 USD. This product is a combination of 2 Enviro-Safe products into 1 for maximum cooling performance. This will remove moisture in the A/C system. Moisture can cause corrosion in the A/C system or the A/C to freeze up.The other part of the product will reduce friction in system and provide colder air duct temps in most cases.Compatible with any automotive refrigerant except ammonia and CO2Drying agentColder airLonger lifeA/C BoosterDO NOT use in ammonia systemsDO NOT use in CO2 systemsGas propelledInstalls the same way as refrigerantCannot be added to a fully charged systemThis product is a combination of 2 Enviro-Safe products into 1 for maximum cooling performance. This will remove moisture in the A/C system. Moisture can cause corrosion in the A/C system or the A/C to freeze up.The other part of the product will reduce friction in system and provide colder air duct temps in most cases.Compatible with any automotive refrigerant except ammonia and CO2Drying agentColder airLonger lifeA/C BoosterDO NOT use in ammonia systemsDO NOT use in CO2 systemsGas propelledInstalls the same way as refrigerantCannot be added to a fully charged system