Improve the performance of your vehicle’s A/C with A/C Pro® Ultra Synthetic R-1234yf A/C Recharge Refill. This advanced auto refrigerant helps your A/C deliver colder, drier air. This refrigerant seals common A/C leaks, including in rubber O-rings, gaskets, and hoses. Plus, this A/C refrigerant prevents the effects of harmful contaminants. Special additives improve your system’s automotive refrigerant performance, including anti-wear additives that help extend A/C life. This car refrigerant refill works with all R-1234yf vehicles, including hybrids and electrics, by connecting to your low-pressure port using a hose and gauge (not included). Nothing cools like A/C Pro®.