For use in adding R1234YF refrigerant to vehicle air-conditioning with highly working performance. Easy and convenient to use. Come with gauge for easily viewing during use and getting a correct charge. Can Opener: [Perfect replacement for R134A charge hose]--R1234YF Refrigerant is a near drop-in replacement for R-134a in automobile A/C applications, helping automakers around the world comply with EU low GWP requirements. Thread: Female 1/2” LH Quick Coupler: Low Side R1234yf 14 mm Female Quick Coupler Package Includes 1 x R1234yf Refrigerant Charging Hose Kit.