To inject the oil or dye, simply connect the injector to the low side of the A/C system and twist the handle until you reach the desired amount.
Mastercool 53123-YF REFILLABLE R1234yf OIL INJECTOR w/Oil
Mastercool 53123 Refillable Universal Oil / Dye Injector
MASTERCOOL A/C MANIFOLD GAUGE SET – R134A and R1234YF – Made in the USA
Manual High Side Coupler For R1234Yf Mastercool, Matco Branded NJ83834
Mastercool 83272 R1234Yf Aluminum Manifold Gage Set Brand New!
Mastercool 63736-K Economy R134a/R1234yf Conversion Kit
