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About product and suppliers:
        Alibaba.com offers 34,959 challenger products. About 4% of these are inkjet printers, 1% are auto lighting system, and 1% are harvesters. 

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

There are 34,301 challenger suppliers, mainly located in Asia. The top supplying countries are China (Mainland), Taiwan, and United States, which supply 97%, 1%, and 1% of challenger respectively. 

Challenger products are most popular in North America, Western Europe, and South America. 

You can ensure product safety by selecting from certified suppliers, including 3,749 with ISO9001, 1,830 with Other, and 911 with BSCI certification.