Large Capacity : Our HVAC Dye Oil Injector is 2 oz Push-in type. 1/4 oz/7.5ml---2oz/60ml. besides, ac oil and dye injector built-in 1/4" SAE connector which has backflow prevent function. Markings etched will help you read easily. Knurled handle designed make the ac oil dye injector rotated easily. Wide Application : Our ac oil injector tool can be used for r134a, r1234yf and r410 system. It can compatible with all types of refrigerants. The HVAC oil injector tool is very suitable for office air conditioning, home air conditioning, and car air conditioning systems. Easy to Use : Firstly, check valve screwed onto cartridge and tightened. The inner and outer cylinders are tightened clockwise, and then a little 1/4 SAE threaded inner core is used to discharge a little air inside the blue tube. Novice can do it independently. Premium Material : Our oil dye injector body is made of premium aluminum alloy, 1/4" SAE connector and r134a r1234yf r410 adapters are made of solid brass. The thickening hose is made of durable rubber material. It can be used for longtime for safe and smoothly connection. AC Oil Injector Kit : Our ac oil injector tool kit includes : 1pcs ac oil dye injector, 1pcs r1234yf low side pressure adapter, 1pcs r134a low side pressure adapter, 1pcs r410 adapter, 1pcs valve core remover, 1pair white gloves. AC Oil Injector Kit for R1234YF, R134A, R410A