The Orion Motor Tech AC Gauges, AC Manifold Gauge Set is designed for use with R-134a, R-502, and R-12 refrigerants. This set includes a manifold, gauge, and 5 feet of hoses, making it a convenient and essential tool for HVAC and refrigeration work. The Orion R134a R12 R502 model ensures compatibility and reliability for accurate readings and efficient troubleshooting. Ideal for professionals in the industry, this gauge set provides the necessary equipment for successful AC servicing and repair.