The T-knob has a sharp internal pin to easily puncture the refrigerant bottle.
R134A AC Refrigerant Charge Hose Kit Quick Coupler, Gauge 1/2'' Can Tap
Can Tap Dispenser Valve For R12 R134a R22 R410 Charge Hose Accessories
Universal Can Tap Dispenser Valve For R12 R134a R22 R410 Charge Hose Access
Ywdiml R134A Car AC Refrigerant Charging Hose, 59" Length 600-3000PSI Yellow
Universal PAG R134a Oil Charge, 3 oz. - Perfect for DIY and Professionals!
