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About product and suppliers:
        Alibaba.com offers 968 stair unit products. About 1% of these are prefab houses, 1% are hydraulic parts. 

A wide variety of stair unit options are available to you, such as steel, stainless steel, and wooden. You can also choose from free samples, paid samples. 

There are 968 stair unit suppliers, mainly located in Asia. The top supplying country is China (Mainland), which supply 100% of stair unit respectively. 

Stair unit products are most popular in Mid East, Southeast Asia, and South Asia. 

You can ensure product safety by selecting from certified suppliers, including 78 with ISO9001, 21 with Other, and 9 with ISO14001 certification.