?Widely Use?:110V/60HZ?4CFM?1/3 HP?Single-Stage?Perfect for maintenance of air conditioners, automobiles and refrigerators?vacuum packaging of food and experimental pumping. ?High Efficiency?:Stable copper motor, high-quality capacitors,intelligent cooling fan,heat proof shell keep it work steadily. ?Humanized Design?:Visual fuel tank,shockproof and wearable base,noise reduction meet all user requirements for a perfect vacuum pump. ?Special Improvement?:Stator and rotor with new process structure,precision machined gear,multi-layer filter make it perform better than others. ?Safety Guarantee?:Anti-collision packaging prevents violent transport.And any quality or use problem , feel free to contact us. We are always here for you.