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About product and suppliers:
        Alibaba.com offers 6,410 metal ruler products. About 35% of these are rulers, 1% are tape measures, and 1% are other dental equipments. 

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

There are 6,461 metal ruler suppliers, mainly located in Asia. The top supplying countries are China (Mainland), Taiwan, and India, which supply 98%, 1%, and 1% of metal ruler respectively. 

Metal ruler products are most popular in North America, Western Europe, and Domestic Market. 

You can ensure product safety by selecting from certified suppliers, including 2,285 with Other, 1,706 with ISO9001, and 170 with FSC certification.