1.Heavy Duty Vacuum Pump: FAD: 4 CFM, Single Stage; Power: 1/4 HP; Ultimate Vacuum: 5PA. Our HVAC vacuum pump is made of heavy-duty aluminum alloy with good heat dissipation abilities, durable and sturdy. A strong copper motor is adopted for stable operation. Besides, it features a non-oil flow back design to avoid chamber contamination. 2.Premium Vacuum Chamber: Capacity: Capacity: 3 Gallon. The stainless steel vacuum chamber is of high strength, can withstand up to 160 F. It is equipped with two silencers to reduce the noise and make the pump run quieter. 50-micron air filter reduces airflow back into the chamber for purging and avoids debris from entering the chamber. 3.Easy Monitoring & Cooling: This AC vacuum pump comes equipped with an oil viewing window to monitor oil levels easily and avoid oil deficiency. Intelligent radiators can cool themselves and avoid stuck things from burning out. The built-in thermal protection function can avoid the machine from burning. 4.Practical Accessories: The vacuum chamber has a 3/5"" acrylic crystal lid, convenient for you to observe the internal state, and is bulletproof. The non-stick silicone gasket allows you to wipe off mixtures easily. The hose is built with steel wire to ensure strength & durability. 5.Wide Application: The device comes with one 4CFM vacuum pump and one 3 gallon vacuum chamber of superior quality. The pump features an ergonomic handle for superior comfort and portability. The vacuum chamber kit is suitable for household air conditioning, automobile maintenance, vacuum packaging, refrigerator vacuum, Industry, etc. And it also fits for defoaming silicone, epoxy, essential oil, polyurethane, etc. ******************************************************************************************************* *Specifications Pumping Rate: 4 CFM Power: 1/3 HP Pump Speed: 1720RPM Voltage: 220V / 50hz Oil Capacity: 225mL Ultimate Vacuum: 5 Pa Material: Alloy Aluminum Shell + Copper + Stainless Steel ******************************************************************************************************* *Pakcage Content 1 x 3 Gallon Vacuum Chamber 1 x 4 CFM Single Stage Vacuum Pump 1 x 3/4"" Acrylic Lid 1 x Heat Treated Silicone Lid Gasket 1 x Glycerin Filled Gauge with Brass Fittings 1 x 50 Micron Air Filter 1 x Non-Stick Silicone Pad 1 x Steel Wire Collapse-Proof Hose 2 x Silencer 1 x Instruction Manual