GBW
GBW or Galvanized Before Weaving is the most common way to make chain link fence in many parts of the world. In this case, the chain link mesh is woven from wire that has already been galvanized (coated with zinc to protect it against corrosion) before it is woven.
Because the zinc is deposited on the surface of the wire at a very high temperature, it does not crack or peel off the metal substrate during the weaving process.
GBW chain link mesh is also available in different grades of classes, which refers to how much zinc is deposited on the surface of the wire.