compatible with all types of oil (POE or mineral oil). Compatible with all types of refrigerants. made of aluminum alloy with a 1/4-inch female threaded connector Compatible with most AC systems Compatible with fluorescent dyes for leak monitoring for home office AC and car AC systems 1.Tank capacity: 1 / 4oz / 7.5ml (minimum) -2oz / 60ml (maximum) 2.Thread size: 1/4 '' SAE 3.Coupler adapter: Low-voltage coupler (inner diameter 13mm) to 1/4 "SAE external thread. 5.Rated working pressure: burst 3000 psi / maximum 600 psi working pressure. 6.Material: aluminum alloy cylinder, rubber tube, pure copper joint Low side quick connector/adapter R-134a Snap Coupler Scale Oil Dye Injector Install Instruction: 1.Rotate the inside cylinder clockwise to the top. 2.Unscrew the cover on the top of the smaller cylinder. 3.Pour the liquid(Refrigeration Oil / Fluorescent Dye / Leak Detection Dye) into the cylinder. 4.Tighten the cover. 5.If the cylinder is not ful filled with oil,then discharge the air is needed.(Rotate the bigger cylinder counterclockwise until the oil flows out at the end of the hose.) 6.Turn on the car air conditioner to the maximum air volume. 7.Attach the low pressure quick connector to the cylinder. 8.Locate the low pressure filler port of the car air conditioner and connect the other end of the quick connector. 9.Rotate the cylinder counterclockwise to inject the oil into the air conditioning system. Specification: Tank capacity Tank capacity: 1 / 4oz / 7.5ml (minimum) -2oz / 60ml (maximum) Thread size 1/4 '' SAE Coupler adapter Low-voltage coupler (inner diameter 13mm) to 1/4 "SAE external thread Rated working pressure burst 3000 psi / maximum 600 psi working pressure. Material1 Aluminum alloy cylinder Material2 rubber tube Material3 pure copper joint Size: Size:without Low Side Quick Connector