PMD Products Automotive Radiator Cooling System Vacuum Purge & Refill Radiator Kit Car Truck Radiator Coolant Vacuum Refill Kit uses Shop Air to Evacuate and Leak Test an Auto's Cooling System. Refills Coolant in Minutes Reduces the refill time of cooling system and prevents the air flow into the system Brass block and tubing under the plastic guard covers, Performs vacuum leak test on cooling system. Easy to connect with shop air and creates a vacuum to remove trapped air in cooling system Required tool for today's automotive cooling systems. Fits most domestic and import cars and light trucks