The Xiaoshan Meigu cage, also called the Xiaoshan warehouse cage or Xiaoshan butterfly cage, is the online sales name Nanjing Tongnuo used when supplying the Xiaoshan area; it is not a separate category of Meigu cage, so keep this in mind when buying. The Meigu cage is itself a warehouse cage: a U-channel steel bottom assembled with mesh panels on top, sturdy and foldable, for storing materials. It is made of steel, normally cold-galvanized on the surface, and can also be hot-dip galvanized or powder-coated. Without special customer instructions, Xintongnuo defaults to cold galvanizing. Regular Meigu cage sizes (units in mm): A-3: 800*600*640; A-5: 1000*800*840; A-7: 1200*1000*890. Non-standard sizes can be custom-built; contact Nanjing Tongnuo Storage Equipment Manufacturing Co., Ltd. for details.