Specification:- Size: Approx 50*166mm- Hose Length: Approx 240mm- Usage:- Before adding any additive to the injector, the shut off valve must be off. Uscrew the end off the injector.- Put in the desired amount of additive.- Screw the end back on the injector.- Connect R134A R12 F22 coupler to the injector.- Connect other end of the injector to the low side service port on the vehicle.- Open the valve on the injector.- With refrigerant attached, fill to proper pressure.- When finished using the injector toool, clean well by using brake cleaner.Package Includes:1 Piece AC Oil and Dye InjectorWelcome to my shop, we are reliable sellers, if you have any questions about your order, please contact us in advance, we will always be here until you get a satisfactory answer