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About product and suppliers:
        Alibaba.com offers 3,344 ratio pack products. About 3% of these are gearboxes, 3% are speed reducers. 

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

There are 3,344 ratio pack suppliers, mainly located in Asia. The top supplying country is China (Mainland), which supply 100% 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 828 with ISO9001, 598 with Other, and 260 with ISO22000 certification.