HTOMT AC Oil Injector Kit, A/C Dye Oil Injector with R1234YF Low Side Quick Coupler and QC12 Quick Coupler, for R1234YF R134A R22 R12 Refrigerant System. [FOR R1234YF/R134A Systems] -- The Professional Grade Oil Dye Injector Kit is compatible with both R134A and R1234YF A/C systems and is designed to inject oil into the A/C system.
