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About product and suppliers:
            1,872 union coupling products are offered for sale by suppliers on Alibaba.com, of which pipe fittings accounts for 15%, machining accounts for 1%, and shaft couplings accounts for 1%. 

A wide variety of union coupling options are available to you, 

There are 1,874 suppliers who sells union coupling on Alibaba.com, mainly located in Asia. The top countries of supplier is China, from which the percentage of union coupling supply is 100% respectively.