Quest Sub-Zero Synthetic refrigerant improves the air conditioner's cooling performance up to 18%. It prevents oxidation and sludge build-up, extends the life of the compressor and reduces engine drag for better gas mileage. It may be used in any auto air conditioner and is compatible with either PAG or POE lubricates. No. 345ZTGR: Size: 19 Oz., Type: R-134a, Pkg Qty: 1, Package Type: Can.