Dye injector can be used with manifold gauge set or any evacuation or recharging equipment. Has a 2 ounce capacity and 1/4 SAE shut-off adapter. This injector may be used to add most air conditioning additives to your system, such as oil, dye, stop leak, etc. This product is a high-quality liquid refrigerant oil filling tube with a long service life. It is not necessary to disconnect the refrigerant inside the system (the system does not need to be in a vacuum condition). Suitable for filling the automobile air conditioning refrigeration system with R134A (requires use of a proper tool), R12, R22. The oil can be unscrewed. Refrigeration oil can be filled into the automobile air conditioning system. High pressure, oil-resistant, practical, wear-resistant, corrosion-resistant, and will not harden. In and out thread size: 1/4 SAE. Oil can capacity: 2 ounces. Pipe working pressure: 600 PSI - 3000 PSI. Total length: 375 mm / 14.8 inches. Item weight: 277 g / 9.8 ounces. Color: silver + blue / silver + red. Material: metal. Package contents: 1 x Oil Injector. Only the above package content is included; other products are not included. Note: Lighting during photography and different displays may cause slight color differences between the item in the picture and the actual product. Measurement allows an error of +/- 1-3 cm.