AC Oil Dye Injector Backflow Prevent Kit, with R134A & R1234YF Low Side Quick Coupler, R410A Mini Split Adapter for R134A R410A R1234YF Refrigerant System( 1/4" SAE Connector,2 OZ Hand Turn Screw). 【Versatile Application】: This professional automotive AC oil dye injector kit accommodates both R134A r410 and R1234YF systems, boasting a capacity of 1/4 oz/7.5ml to 2oz/60ml.
