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About product and suppliers:
        Alibaba.com offers 10,725 simplex duplex products. About 75% of these are fiber optic equipment, 1% are telecom parts, and 1% are repeater. 

A wide variety of simplex duplex options are available to you, such as alloy, stainless steel, and steel. You can also choose from free samples, paid samples. 

There are 10,725 simplex duplex suppliers, mainly located in Asia. The top supplying country is China (Mainland), which supply 100% of simplex duplex respectively. 

Simplex duplex products are most popular in North America, Southeast Asia, and Western Europe. 

You can ensure product safety by selecting from certified suppliers, including 3,911 with ISO9001, 855 with Other, and 711 with ISO14001 certification.