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About product and suppliers:
        Alibaba.com offers 1,147 types of screw jack products. About 19% of these are car jacks, 14% are scaffoldings, and 8% are ladder & scaffolding parts. 

A wide variety of types of screw jack options are available to you, such as scaffolding props, scaffolding frames, and scaffolding planks. You can also choose from free samples, paid samples. 

There are 1,158 types of screw jack suppliers, mainly located in Asia. The top supplying countries are China (Mainland), India, and Japan, which supply 96%, 1%, and 1% of types of screw jack respectively. 

Types of screw jack products are most popular in Eastern Europe, South America, and Domestic Market. 

You can ensure product safety by selecting from certified suppliers, including 564 with ISO9001, 189 with Other, and 37 with ISO14001 certification.