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About product and suppliers:
        Alibaba.com offers 3,949 ratio pack products. About 4% of these are speed reducers, 2% are gearboxes. 

A wide variety of ratio pack options are available to you, such as planetary, worm, and helical. You can also choose from free samples, paid samples. 

There are 3,880 ratio pack suppliers, mainly located in Asia. The top supplying countries are China (Mainland), Indonesia, and India, which supply 98%, 1%, and 1% of ratio pack respectively. 

Ratio pack products are most popular in North America, Western Europe, and Eastern Europe. 

You can ensure product safety by selecting from certified suppliers, including 899 with ISO9001, 766 with Other, and 229 with ISO22000 certification.