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About product and suppliers:
        Alibaba.com offers 2,683 screw loop products. About 3% of these are water bottles, 1% are key chains, and 1% are bottles. 

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

There are 2,683 screw loop suppliers, mainly located in Asia. The top supplying countries are China (Mainland), India, and Pakistan, which supply 97%, 1%, and 1% of screw loop respectively. 

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

You can ensure product safety by selecting from certified suppliers, including 947 with ISO9001, 131 with Other, and 74 with ISO14001 certification.