Heavy Duty Vacuum Pump: FAD: 4.8 CFM, Single Stage; Power: 1/3 HP; Ultimate Vacuum: 5PA. Our HVAC vacuum pump comprises heavy-duty aluminum alloy with durability and sturdiness. The strong copper motor provides continuous power, and a shock-proof base supports the stable operation. Precise Manifold Gauges: The refrigeration kit has manifold gauges. The dual-pressure gauges are high quality, allowing you to know the actual working pressures anytime to facilitate easy maintenance systems. Besides, the oversized sight-glass is designed for easy viewing of the refrigerant flow. Multifunctional Hoses: The four hoses are made of premium rubber with different colors. Their brass fittings are 45 degrees on one hand and straight on the other, providing a leak-proof seal. Characterized by high working pressure and various connection sizes, the hoses can satisfy your different requirements