This tank can be used in R134A system, R1234YF air conditioning system, R12, R22 system. Oil cylinder thread 1/4SAE with 1234YF low quick connector and R134A adjustable low pressure connector, plus R134A system oil quantity detection cotton Rated working pressure:3000 psi burst / 600 psi Max. working pressure. [Widely used for charging A/C systems] - 1.Addition of oil to the system 2.Re-oiling the system after a change 3.Add Scanner Fluorescence Solution 4.Injection of additives into the system Oil cylinder is filled with 2 ounces of refrigeration oil, check valve screwed onto and tightened. The inner and outer cylinders are tightened clockwise, and then a little 1/4 SAE threaded inner core is used to discharge a little air inside the blue tube. Connect the low-pressure port of the refrigeration system that needs to be refueled, and add the required amount of cooling oil to the inner and outer cylinders. [Easy to use] - Filling the A/C system is easy with the oil dye injector.First, the air conditioning and set it to the maximum cooling setting, then connect the injector to the low side. step is to use the measuring cup to measure the amount of paint or oil you need, then pour it into the body of the pump and tighten the cap. Finally, turn the knurled knob and the piston gently push the paint or oil into the A/C system., Weight: 1.6424438519 Pounds, Manufacturer: Yoeruers