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About product and suppliers:
        Alibaba.com offers 19,306 door contact products. About 32% of these are alarm, 1% are elevator parts, and 1% are doors. 

A wide variety of door contact options are available to you, such as auto, door, and personal. You can also choose from free samples, paid samples. 

There are 19,355 door contact suppliers, mainly located in Asia. The top supplying countries are China (Mainland), Australia, and Taiwan, which supply 98%, 1%, and 1% of door contact respectively. 

Door contact products are most popular in North America, Mid East, and Western Europe. 

You can ensure product safety by selecting from certified suppliers, including 4,393 with ISO9001, 718 with Other, and 606 with ISO14001 certification.