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About product and suppliers:
        Alibaba.com offers 797 optical ruler products. About 6% of these are rulers. 

A wide variety of optical ruler options are available to you, such as plastic, metal. You can also choose from yes, no. As well as from free samples, paid samples. 

There are 797 optical ruler suppliers, mainly located in Asia. The top supplying country is China (Mainland), which supply 100% of optical ruler respectively. 

Optical ruler products are most popular in North America, Western Europe, and Eastern Asia. 

You can ensure product safety by selecting from certified suppliers, including 571 with Other, 230 with ISO9001, and 43 with ISO13485 certification.
        
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