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About product and suppliers:
        Alibaba.com offers 496 20mm hdpe plate products. About 65% of these are plastic sheets. 

A wide variety of 20mm hdpe plate options are available to you, such as free samples. 

There are 417 20mm hdpe plate suppliers, mainly located in Asia. The top supplying country is China (Mainland), which supply 100% of 20mm hdpe plate respectively. 

0mm hdpe plate products are most popular in Domestic Market, North America, and Southeast Asia. 

You can ensure product safety by selecting from certified suppliers, including 304 with ISO9001, 25 with ISO14001, and 15 with OHSAS18001 certification.