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About product and suppliers:
        Alibaba.com offers 5,131 composite block products. About 3% of these are refractory, 1% are blocks, and 1% are engineered flooring. 

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

There are 5,131 composite block suppliers, mainly located in Asia. The top supplying country is China (Mainland), which supply 100% of composite block respectively. 

Composite block products are most popular in North America, Southeast Asia, and Domestic Market. 

You can ensure product safety by selecting from certified suppliers, including 2,028 with ISO9001, 781 with Other, and 773 with ISO13485 certification.