Interdynamics A/C Pro Ultra Synthetic A/C Recharge R-134a (20 ounces) All-in-one recharge solution replaces lost refrigerant and oil in automotive A/C system Contains moisture and acid buildup eliminators Advanced formula works quickly to seal common A/C leaks in rubber O-rings, gaskets and hoses Includes a reusable trigger dispenser with built in low-pressure gauge and extra long 24" recharge hose for accessing hard to reach service ports Fast and easy: a 10 minute job with three easy step