Sub-Zero synthetic refrigerant kit has a specially designed formula featuring Cool Boost technology that helps a vehicle’s A/C produce colder air. The approximately 17 oz of R-134a and 1 oz of additives are used to recharge a vehicle’s A/C system, seal common leaks in rubber components and help extend the A/C system’s life by eliminating acid and moisture buildup. This Sub-Zero kit comes with a reusable charging hose and gauge.Contains approximately 17 oz of R-134A and 1 oz of additivesCool Boost additive brings cold air back fastContains leak sealer to seal common A/C leaks in rubber hoses, gaskets and O-ringContains moisture and acid buildup eliminator which helps extend A/C system lifeComes with reusable charging hose and gauge with trigger dispenser for fast and accurate recharging