NovelBee R134A AC Oil Dye Injector 2oz Air Conditioning Oil Dye Filling Syringe Tool

? Feature Tank Capacity: 2 OZ Material: Aluminum Pipe working pressure:600PSI-3000PSI Connections:1/4’’SAE Male and Female or 1/2" ACME Male and Female Adds oil by allowing vacuum to pull it in after evacuation process or use refrigerant to push it in using the recharge process Suitable for filling up the automobile air conditioning refrigeration system of R134A, R12, R22 For professional technicians using bulk A/C oil for injection into A/C system or injecting UV dye for leak detection ? Instruction Before adding any additive to the injector, the shut off valve must be off Unscrew the end of the injector. Put in the desired amount of additive. Screw the end back on the injector. Connect R134A R12 F22 coupler to the injector. Connect other end of the injector to the low side service port on the vehicle. Open the valve on the injector. With refrigerant attached, fill to proper pressure. When finished using the injector tool, clean well by using brake cleaner. ? Please note A/C must be running with the compressor on before injecting additive or refrigerant