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About product and suppliers:
        Alibaba.com offers 3,984 18mm aluminum cap products. About 35% of these are lids, bottle caps, closures, 1% are wine stoppers. 

A wide variety of 18mm aluminum cap options are available to you, such as screw cap, twist off cap, and pump sprayer. You can also choose from bottles, jars, and cans. As well as from aluminium-plastic, metal, and plastic. And whether 18mm aluminum cap is non spill, non-refillable, or pilfer-proof. 

There are 3,984 18mm aluminum cap suppliers, mainly located in Asia. The top supplying country is China (Mainland), which supply 100% of 18mm aluminum cap respectively. 

8mm aluminum cap products are most popular in North America, Western Europe, and South America. 

You can ensure product safety by selecting from certified suppliers, including 858 with ISO9001, 357 with Other, and 202 with ISO14001 certification.