Refrigerant Application R134A, R12, R22, R502 R134A, R12, R22, R502 R410A, R134A, R12, R22 R410A, R134A, R22, R32 R1234YF, R134A R1234YF, R134A, R404A. Multifunctional A/C Gauge Set, professional 3 way automotive air conditioning diagnostic manifold gauge set will compatible with R 134A R12 R22 R502 refrigerants, perfect for AC freon charging, evacuation, diagnostic check and recovery work.