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About product and suppliers:
        Alibaba.com offers 668 4 mm fiberglass rod products. About 69% of these are other fiberglass products, 3% are insulation materials & elements, and 3% are fishing rods. 

A wide variety of 4 mm fiberglass rod options are available to you, such as free samples, paid samples. 

There are 668 4 mm fiberglass rod suppliers, mainly located in Asia. The top supplying country is China (Mainland), which supply 100% of 4 mm fiberglass rod respectively. 

 mm fiberglass rod products are most popular in Western Europe, North America, and Southeast Asia. 

You can ensure product safety by selecting from certified suppliers, including 242 with ISO9001, 116 with ISO14001, and 33 with Other certification.