Universal Refrigerant Compatibility: Compatible with a variety of refrigerants, including R134a, R22, R12, R502, R410A, R404A, and R407C. This AC vacuum pump and manifold gauge set is ideal for automotive A/C systems, HVAC maintenance, refrigeration tasks, and industrial applications requiring high vacuum levels from a compact pump. Powerful & Efficient Vacuum Pump: This 4.5 CFM single-stage vacuum pump, powered by a durable 4-stage pure copper motor, delivers an ultimate vacuum of 5 Pa. With a 0.27 qt. (260 ml) oil capacity, it ensures efficient and reliable performance for maintaining refrigeration systems. Precise Pressure Monitoring: The upgraded PRO manifold gauge features an impressive ±1.6% accuracy and enhanced pressure resistance. It allows you to precisely monitor and adjust the pressure of your system in real time. The large viewing glass ensures clear, easy-to-read measurements every time. Secure & Easy Connection: The included three color-coded 3