A/C Pro ultra synthetic refrigerant kit features a specially designed formula that helps a vehicle's A/C produce the coldest air. The approximately 17 oz. of R-134a and 3 oz. of additives are used to recharge a vehicle's A/C system, seal common leaks in the rubber components, and protect and extend the A/C system's life by eliminating acid and moisture buildup. This #1 selling A/C recharge kit (according to NPD 2016) comes with a reusable extra-long braided charging hose and gauge. Product Features:Approved for use in CaliforniaContains approximately 17 oz. of R-134a and 3 oz. of additivesComes with reusable extra-long braided charging hose and gauge with trigger dispenser for easy, convenient, and accurate rechargingContains leak sealer to seal common A/C leaks in rubber hoses, gaskets, and O-rings