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About product and suppliers:
        Alibaba.com offers 24,495 square plastic cover products. About 1% of these are agricultural plastic products, 1% are other plastic products, and 1% are pipe fittings. 

A wide variety of square plastic cover options are available to you, such as injection, blow molding, and extruding. You can also choose from plastic, pvc, and pp. As well as from non spill, child-proof. And whether square plastic cover is bottle stopper, screw cap, or spout cap. 

There are 24,495 square plastic cover suppliers, mainly located in Asia. The top supplying country is China (Mainland), which supply 100% of square plastic cover respectively. 

Square plastic cover products are most popular in North America, Western Europe, and Domestic Market. 

You can ensure product safety by selecting from certified suppliers, including 5,914 with ISO9001, 2,891 with Other, and 978 with ISO14001 certification.