Mastercool R1234Yf Visual Inspection Sight Glass with R1234Yf Quick Couplers (53376-YF)

R1234Yf Visual Inspection Sight Glass with R1234Yf Quick CouplersCan be used with a standard vacuum pump or with the vacuum function on your R/R/R machineAllows user to visually inspect the refrigerant in any R134a or R1234yf system and identify excess dye, oil or debrisAllows the user to extract a small portion of the refrigerant for actual visual inspectionLeak free, ball valve controlled and will allow the refrigerant extracted for the visual inspection to be deposited back into the system