◆Widely compatibility:This A/C Hand Turn Oil and Dye Injector with a Low Side Port Coupler ,quick snap-On 13 mm female connector to R134a manifold to work on car AC systems alike. Compatible with fluorescent dyes for leak monitoring, all oil types(POE, or mineral oil) and all home office AC and car AC systems. | ◆Large capacity: 2 oz Push-in type, A/C Oil and dye injector refrigerant tools with snap quick coupler.1/4 oz-2oz / 7.5ml-60ml. It does not depend on a working compressor to get the oil or fluorescent dye into the system, one shot may cure and save a sickened compressor caused by low oil. | ◆Easy to install：There are three parts： R134A snap quick coupler，check valve and oil cylinder。Firstly, check valve screwed onto cartridge 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 | ◆Wide range of functions: AC Oil and dye injector, hand turn filler injection tool , is a kind professional field service tool with aluminum alloy body, and brass connector on a piece of high pressure hose 1/4" female connector, make it compatible with most AC systems (if not, use CV23p for some 5/16" R410a systems). | ◆Providing high quality and professional parts with great service.if you have any questions, please feel free to contact us by email for more information!We will solve it for you in the first time!