Self-Sealing R134A Refrigerant Recharge Kit, AC Recharge Hose Kit with Gauge NEW
Fittings: R134a low pressure side quick coupler and R134a self-piercing type can tap. Clockwise turn T type knob to pierce R134a can, and then anticlockwise turn T type knob to retract the internal pin, to connect the R134a can and the AC system for charging refrigerant.