High-Efficiency Vacuuming: This single-stage rotary vane vacuum pump features a robust 1/4 HP motor, delivering a 3.5 CFM flow rate and an ultimate vacuum of 5 Pa. Ideal for HVAC maintenance, it ensures deep cleaning and reliable results every time Stable & Reliable Operation: Equipped with a 4-pole high-torque motor, this HVAC vacuum pump runs efficiently for extended periods. Its cast-iron and die-cast aluminum housing with a built-in cooling fan avoids overheating, maintaining stable performance Excellent Compatibility: Equipped with both 1/4-inch SAE and 1/2-inch ACME air inlet ports, this vacuum pump easily connects to automotive A/C systems and small R22, R134a, and R410a refrigerant systems User-Friendly Design: With a 0.21 qt. (200 ml) oil capacity and a transparent oil window, checking oil levels is simple. This air conditioning vacuum pump even includes a bottle of 0.21 qt. (200 ml) vacuum oil, so you can use it right out of the box Versatile Applications: This AC vacuum pump automotive is designed for refrigeration servicing, HVAC repair, resin degassing, and wood stabilization. It is suitable for both professional and home use and handles multiple industries and creative projects