MATERIAL Our HVAC vacuum pump is made of heavyduty aluminum alloy with good heat dissipation abilities and sturdy Strong copper motor with stable operation The base was made of composite rubber material for extending machine life NO FLOW BACK- The refrigerant vacuum pump is designed to avoid chamber contamination by avoiding oil from flowing back and polluting its container and tubes. Oil fill port makes oil adding simpler since the port is accessible from the front or either side. VIEWABLE OIL WINDOW- This AC vacuum pump comes equipped with an oil viewing window so that you can easily monitor oil levels and quality, avoid oil deficiency. The oil drain valve at the bottom of the oil reservoir ensures faster and more complete draining. INTELLIGENT RADIATOR - Our vacuum pump tool can cool itself and avoid it from burning out when something is stuck. Built-in thermal protection can avoid burning machines and extend the machine's life. WIDE APPLICATION- Ergonomic grip handle is designed for superior comfort and portability. The automotive vacuum pump is suitable for household air conditioning, automobile maintenance, vacuum packaging, refrigerator vacuum, Industry, etc. Note:Please note that the oil bottle contains no oil. This product cannot be used with alcohol, such as wood stabilization industries.There is residual oil from the factory inspection, if it leaks due to the packaging upside down, it will not affect the use., Manufacturer: KOGEDSS