Use this syringe-type injector to add oil to a fully pressurized A/C system .
Mastercool 53123-YF REFILLABLE R1234yf OIL INJECTOR w/Oil
Robinair 18470 R1234YF POE Oil Only Syringe-Type injector
R1234yf Oil Injector-Pag ROB-18465 Brand New!
R1234yf Oil Injector - Poe Lab ROB-18470 Brand New!
AC Oil Injector for R1234YF, R134A, R410A, HVAC Dye with 2 oz
AC Oil Injector for R1234yf R134a R410a, Dye with Shut-Off Yellow
