Keep your vehicles cooling system operating efficiently with a can of A/C Pro Professional Formula Refrigerant. This ultra-synthetic formula seals A/C leaks and provides maximum cold air while extending your system life. This Auto air conditioner recharge kit features a refrigerant that provides the fix you need for your automobile and can be done in about 10 minutes. It is #1 rated and independent tests on this product confirm the patented formula with 2x cooling boosters delivers the coldest air to your vehicle s A/C. This automotive accessory also features an advanced leak sealing formula that works to quickly to seal common A/C leaks in rubber 0-rings gaskets and hoses. It also features easy convenient and accurate recharging. This 20 oz can comes with a reusable extra-long heavy-duty charging hose and gauge for added convenience. This item contains R-134a.