Common cage surface treatment, without special requirements, is cold galvanizing. The hot-dip galvanized cage is a special-order product. Hot-dip galvanized cages are treated by the hot-dip galvanizing process, with stronger corrosion and moisture resistance, mainly for damp environments. In those settings cold-galvanized cages rust easily, while hot-dip clearly extends service life. Nanjing Tongnuo Storage Equipment Manufacturing Co., Ltd. advises: if your cage runs in an ordinary dry workshop, cold galvanizing suffices; for outdoors, basements, humid coastal sites, or long ocean shipping, choose hot-dip galvanizing.