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About product and suppliers:
        Alibaba.com offers 7,557 nipple reducer products. About 94% of these are pipe fittings, 1% are speed reducers, and 1% are gearboxes. 

A wide variety of nipple reducer options are available to you, such as copper, plastic, and stainless steel. You can also choose from nipple, coupling, and cap. As well as from welding, male, and female. And whether nipple reducer is reducing, or equal. 

There are 7,557 nipple reducer suppliers, mainly located in Asia. The top supplying country is China (Mainland), which supply 100% of nipple reducer respectively. 

Nipple reducer products are most popular in Mid East, Domestic Market, and Western Europe. 

You can ensure product safety by selecting from certified suppliers, including 2,595 with ISO9001, 928 with Other, and 616 with ISO14001 certification.