1.3 POINT POSITION SCALE: This nitrogen flushing tool features a quick and easy 3point position scale to swiftly switch between rinse, solder, and shutdown settings, ensuring the correct nitrogen flow rate for each operation. 2.1/4' CONNECTOR: Quickly connects to the outlet of a standard nitrogen pressure regulator. Attach a standard 1/4inch coolant hose to complete rinsing and soldering in seconds. 3.PRODUCT USE: Facilitates smooth nitrogen penetration into pipes during rinsing and soldering processes, removes refrigerants and deposits, prevents oxidation and equipment failures, and ensures pipeline cleanliness. 4.STABLE AND ACCURATE: With an input pressure of 50 psi and a maximum pressure of 200 psi, it provides precise nitrogen control, delivers more stable flushing and soldering results, and minimizes gas waste.