Practical Tools - R1234YF adapter can convert R134A to R1234YF and is compatible with 3-way R1234yf AC manifold pressure gauge set, making it suitable for all models that use R1234yf refrigerant replenishment work Wide Application - R1234YF to R134A conversion kit is suitable for automotive R1234YF, R12 and R134A refrigerants, and is widely used in automotive Freon replenishment hoses, air conditioning oil injectors, refrigerator Freon replenishment, air conditioning manifold pressure gauges, diagnostic inspections, recovery and evacuation activities High-quality Material - R1234YF to R134A refrigerant recharge kit adapter is made of high-quality brass to ensure its stable performance, waterproof and rust-proof, not easy to deform or break, sturdy and durable, and long service life Leak-free Connection - 134a adapter fittings adapter adopts ball lock and rubber sealing ring design to ensure the interface is firm and tight to prevent leakage. This is an efficient, convenient and