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About product and suppliers:
        Alibaba.com offers 3,961 metal oil diffuser products. About 30% of these are humidifiers, 6% are air fresheners, and 1% are essential oil. 

A wide variety of metal oil diffuser options are available to you, such as ce, cb, and emc. You can also choose from ultrasonic humidifier, cool-mist impeller humidifier, and evaporative humidifier. As well as from tabletop / portable, usb, and central. And whether metal oil diffuser is humidistat, or manual. 

There are 4,003 metal oil diffuser suppliers, mainly located in Asia. The top supplying countries are China (Mainland), Taiwan, and India, which supply 98%, 1%, and 1% of metal oil diffuser respectively. 

Metal oil diffuser products are most popular in North America, Western Europe, and Eastern Europe. 

You can ensure product safety by selecting from certified suppliers, including 573 with ISO9001, 228 with ISO14001, and 215 with OHSAS18001 certification.