R1234YF AC System Visual Inspection Sight Glass W-R1234YF Manual Coup

Mastercool, 53377-YF, R1234yf Visual Inspection Sight Glass with R1234yf Manual Couplers53377-YF Includes Only:(53375) Refrigerant Oil Visual Inspection Sight Glass(84274) 1/4 fl-f x 17 mm-m R1234yf Adapter with Valve Core(53376-601YF) 60" Blue R1234yf Charging Hose(53376-603YF) 60" Red R1234yf Charging Hose(83834) High Side R1234yf 12 mm-F x 17 mm Manual Coupler(83934) Low Side R1234yf 12 mm-F x 14 mm Manual CouplerFeatures:Allows 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 systemThe condition of the refrigerant in your A/C system is an important factor in the proper operation of all components and overall cooling efficiency. The only way to actually see the condition of the refrigerant in your vehicle's A/C system is with the use of the Mastercool visual inspection sight glass.This unit can be used with a standard vacuum pump or with the vacuum function on your R/R/R machine. Easy to follow instructions will guide you through the use of either option.