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About product and suppliers:
        Alibaba.com offers 200 pd ruler products. About 62% of these are other optics instruments, 18% are rulers, and 2% are other fitness & bodybuilding products. 

A wide variety of pd ruler options are available to you, such as free samples, paid samples. 

There are 204 pd ruler suppliers, mainly located in Asia. The top supplying countries are China (Mainland), Taiwan, and Japan, which supply 98%, 1%, and 1% of pd ruler respectively. 

Pd ruler products are most popular in Western Europe, Mid East, and Eastern Asia. 

You can ensure product safety by selecting from certified suppliers, including 38 with Other, 26 with ISO9001, and 25 with ISO13485 certification.