Screw jack 1. Made in GuangZhou 2. ISO9001:2000 System Guarantee 3. 100% tests passed the product has a compact, small size, easy to intall, in the form of multi-input, high reliability,long life etc..The product is a kind of lifting parts, and other series worm gear screw lift compared with a compact,small size,easy to install,in the form of multi-input, high reliability, long life and many ...