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About product and suppliers:
        Alibaba.com offers 39 doughnut aroma diffuser products. About 92% of these are humidifiers, 2% are air purifiers. 

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

There are 39 doughnut aroma diffuser suppliers, mainly located in Asia. The top supplying country is China (Mainland), which supply 100% of doughnut aroma diffuser respectively. 

Doughnut aroma diffuser products are most popular in North America, Eastern Europe, and Western Europe. 

You can ensure product safety by selecting from certified suppliers, including 7 with ISO9001, 4 with Other, and 1 with ISO14001 certification.