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About product and suppliers:
        Alibaba.com offers 331 parallel ruler products. About 70% of these are rulers, 19% are other measuring & gauging tools, and 1% are clipboard. 

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

There are 331 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 224 with Other, 124 with ISO9001, and 7 with OHSAS18001 certification.