R1234YF Quick Coupler Kit, R1234yf to R134a Quick Coupler Adapter, R1234YF High and Low Side Quick Couplers Kit with R134A R12 R22 Valve Core for AC Charging Refrigerant Air Conditioning System. : R1234YF low side quick coupler: blue R1234yf coupler 14 mm female x 1/4"SAE male.
