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About product and suppliers:
        Alibaba.com offers 7,924 simplex duplex optical products. About 1% of these are telecom parts, 1% are wireless networking equipment. 

A wide variety of simplex duplex optical options are available to you, such as free samples, paid samples. 

There are 7,939 simplex duplex optical suppliers, mainly located in Asia. The top supplying countries are China (Mainland), India, and South Korea, which supply 99%, 1%, and 1% of simplex duplex optical respectively. 

Simplex duplex optical products are most popular in North America, South America, and Eastern Europe. 

You can ensure product safety by selecting from certified suppliers, including 3,497 with ISO9001, 691 with Other, and 576 with ISO14001 certification.