6PCS AC Oil Checker & Refrigerant Oil Analyzer - Compatible with R134a/R1234yf System, Automotive Air Conditioning Tester ToolOnly compatible for R134a / R1234yf system.AC Oil Checker Analyzer Tester is aim to detect the oil level of air conditioner and harmful acids in the oil of air conditioner system without changing the air conditioner system and draining all the oil in the system.R134A Oil CheckerAir conditioning refrigerant oil test paperAC Oil Checker.
