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About product and suppliers:
        Alibaba.com offers 594 composite door jamb products. About 57% of these are doors, 26% are door & window frames. 

A wide variety of composite door jamb options are available to you, such as door & window frames, entry doors. You can also choose from composite, mdf, and solid wood. As well as from interior, exterior, and commercial. And whether composite door jamb is swing, or automatic. 

There are 590 composite door jamb suppliers, mainly located in Asia. The top supplying country is China (Mainland), which supply 100% of composite door jamb respectively. 

Composite door jamb products are most popular in Mid East, Western Europe, and South Asia. 

You can ensure product safety by selecting from certified suppliers, including 264 with ISO9001, 64 with FSC, and 43 with Other certification.