ChinaChinaRotaryScrewAirCompressorSuppliers The advantage for screw air compressor with tank: 1. IE4 permanent magnet motor, with heacy duty inverter, saving energy over 20-30%; 2. Constant pressure and silence; 3. Small footprint, can be moved at any time; 4. Large size air end, low speed, sufficient air volume; 5. Six heavy-duty bearings, morse taper connection; 6. Easy to install and maintain; 7. Single phase 220v voltage, 50/60hz automatically adjust. Specification: Certificate: Make sure about the machine quality after placing the order: Before delivery, we will send you the pictures and videos for you to check the machine quality. And also you can arrange for quality checking by yourself or by your contacts in china. Trust us: We have our business license and certificate, and we signed the contract and it is legally responsible. We will send you the machine after you send you the money. About delivery service: Provide, please inform us of your final destination, we will check with our shipping agent to quote the shipping cost for your reference before delivery.ChinaChinaRotaryScrewAirCompressorSuppliers website:http://www.hengchaowintechnology.com/rotary-screw-air-compressor/