A/C Pro professional formula ultra synthetic refrigerant recharging kit replaces lost refrigerant to air conditioning system. Cools interior faster with cooler, drier air. Seals air conditioning system leaks, protects and extends air conditioning life. Reusable trigger dispenser with built-in low pressure gauge and temperature dial indicator. 24" recharge hose for accessing hard to reach service ports. Step-by-step instruction booklet included.