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About product and suppliers:
        Alibaba.com offers 46,671 round window products. About 4% of these are windows, 1% are wall clocks, and 1% are ovens. 

A wide variety of round window options are available to you, such as swing, automatic, and fixed. You can also choose from sliding windows, casement windows, and storm windows. As well as from aluminum alloy, plastic, and wooden. And whether round window is horizontal, or vertical. 

There are 46,545 round window suppliers, mainly located in Asia. The top supplying countries are China (Mainland), Taiwan, and India, which supply 98%, 1%, and 1% of round window respectively. 

Round window products are most popular in North America, Western Europe, and Domestic Market. 

You can ensure product safety by selecting from certified suppliers, including 14,630 with ISO9001, 5,883 with ISO14001, and 5,719 with Other certification.