IDQ High Mileage 134a Refrigerant with System Safe Leak Sealer (12 ounces) (CA Compliant) 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. This item contains R-134a.