A/C Pro ACP-100 Ultra Synthetic R-134a Car Refrigerant Kit - 20 OZ A/C Pro ACP-100 Professional Formula Ultra Synthetic R-134a Car Refrigerant Kit helps make recharging your car’s AC easy and accessible. This auto AC recharge kit features an additive formula that seals leaks in rubber hoses gaskets and O-rings and protects your AC system while providing 2x cooling boosters versus the next leading brand of AC recharge kits. Each R-134a refrigerant kit helps eliminate acid and moisture buildup to protect and extend the AC system’s life. This AC leak sealer comes with a reusable extra-long braided AC charging hose and AC gauge for easy convenient and accurate recharging. To use find the low-pressure port turn on the car and AC read the pressure and charge the system. Feel empowered to take on DIY car care and refill the chill yourself with A/C Pro. This item contains R-134a.