Check the listing for details. Enviro-Safe Auto A/C R134a Replacement Refrigerant with Stop Leak 8oz can Gauge. Condition: New. Listed at 28.99 USD. 1 can of Replacement with Stop Leak & Brass Gauge DO NOT USE IN AMMONIA SYSTEMS! DO NOT PULL A VACUUM ON THE A/C SYSTEM. If you plan to pull a vacuum or are charging a larger system or dual air system such as on a van, suburban, or SUV, use Enviro-Safe Industrial Replacement refrigerant. Bring your a/c performance back to the original cold air! This is the original Enviro-Safe Refrigerant that we first introduced over 20 years ago. Operates at lower head pressure Offers improved cooling properties and performance Compatible with most refrigerant oils Non Ozone depleting Non Global warming Use up to 60% Less Made in America! Enviro-Safe has been manufacturing hydrocarbon refrigerants for over 22 years. Enviro-Safe™ Replacement Refrigerant also meets international standards such as—ISO 5149, BS 4434-1995, AS/NZS 1677 and ASHRAE 5149.Stop Leak:With age, o rings and seals will shrink and deteriorate. When Enviro-Safe Stop Leak is added to your a/c system, it reconditions the rubber o rings and seals. When the Stop Leak product is installed in an air conditioning system, the product mixes with the refrigerant and oil. As the product circulates in the system, it comes in contact with the o’rings and seals causing them to swell, resulting in "no leak". Stopleak will not repair or "fix" cuts or worn out o’rings or seals. Installing Enviro-Safe Stop Leak may stop the yearly recharge of lost refrigerant. Use only with Mineral, Ester, and Pag oils.