Interdynamics EZ Chill Refrigerant R-134a With Lubricant And Leak Sealer (13 oz.) All in one solution to restore lost refrigerant and oil in automotive air conditioning systems Contains system safe leak sealer additive that seals common A/C leaks in rubber hoses, gaskets and O-rings Built in disposable recharge hose No tools required Safe for all R-134a systems when used as directed