Features:
Material:  Mainly made of brass, anti-rust with wear resistance, strong and impact-resistant, not easy to deform during long-term use

No Leak:  The side-mounted ball valve opens and closes with a quarter-turn, preventing refrigerant leakage from the air conditioning system during maintenance procedures. Integrated O-rings ensure a complete seal, automatically creating a hermetic seal and preventing any refrigerant leakage

Wide Compatibility:  Works with most standard and Schrader valve cores found in R134a, R1234yf, and R22 automotive A/C systems. Note: Not compatible with JRA specification valve cores

Quick Coupler:  Includes a red high-pressure coupler (16mm I.D.) and a blue low-pressure coupler (13mm I.D.), for easy replacement of A/C valve cores in vehicles

Package Includes:
2 pcs R134a valve removers(high/low pressure)
2 pcs R1234yf couplers(high/low pressure) 
2 pcs R134a valve cores
2 pcs R22 valve cores
2 pcs large O-rings 
2 pcs small O-rings