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About product and suppliers:
        Alibaba.com offers 324 parallel ruler products. About 74% of these are rulers, 12% are other measuring & gauging tools. 

A wide variety of parallel ruler options are available to you, such as triangular ruler, straight ruler. You can also choose from plastic, wood. As well as from yes, no. And whether parallel ruler is free samples. 

There are 324 parallel ruler suppliers, mainly located in Asia. The top supplying country is China (Mainland), which supply 100% of parallel ruler respectively. 

Parallel ruler products are most popular in Western Europe, South America, and Eastern Asia. 

You can ensure product safety by selecting from certified suppliers, including 242 with Other, 137 with ISO9001, and 4 with OHSAS18001 certification.