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About product and suppliers:
        Alibaba.com offers 21,143 optical diameter products. About 1% of these are plastic tubes, 1% are steel pipes. 

A wide variety of optical diameter options are available to you, such as q235, 10#, and 20#. You can also choose from astm, jis, and bs. As well as from free samples, paid samples. 

There are 21,143 optical diameter suppliers, mainly located in Asia. The top supplying country is China (Mainland), which supply 100% of optical diameter respectively. 

Optical diameter products are most popular in North America, South America, and South Asia. 

You can ensure product safety by selecting from certified suppliers, including 3,374 with ISO9001, 2,342 with Other, and 371 with ISO14001 certification.