R134A R12 R22 Manifold Gauges A/C Tester Freon gas Service Diagnostic AC. Ideal for R134a R12 R22. Reading in Celcius for R134a, R22, R12. Red and Blue 60" long charging hose R12, R22, R134A x 60 " with knurled fittings SAE ( 1/4" FFL x 60 " with knurled fittings).