Certified A/C Pro R-134a PAG 100 Medium Viscosity Refrigerant Oil with UV Dye. This product contains approximately 8 fluid ounces of PAG refrigerant oil with UV dye. Medium viscosity PAG oil for R-134a auto A/C systems; ISO 100 viscosity. R-134a PAG 100 Medium Viscosity AC Oil Lubricant with UV Dye features system safe UV leak detection dye. The PAG oil helps quiet noisy compressors. Meets OEM specifications. Product Features:Medium viscosity PAG oil for R-134a auto A/C systems; ISO 100 viscositySystem safe UV leak detection dyeMeets OEM specifications