Designed for older cars and trucks, the High Mileage Vehicle R-134a Refrigerant will help to restore your systems air conditioner so you can enjoy your ride. It contains anti-wear additives and lubricant to help restore viscosity. In addition, this vehicle refrigerant has a self-venting valve and is CARB approved. It also includes Stop Leak that eliminates loss of refrigeration by creating a seal around the chamber. Product Features:Replaces lost R-134a refrigerant in automotive A/C systemExtends life of older or high-usage A/C systemsSafely seals leaks in hoses, gaskets, seals and O-ringsACME threaded topRecharging hose sold separately