Use galvanized sheet steel. Taking into account the rust and bend-resistant. 

Note that is connected to the wall using glue or desk sets. 

We recommend that the arrangement density :3-5 / m， if the wall poor conditions (rough)， or wire too， please add a few (proposed purchase buy some spare time); Conversely， if walls better， but relatively light wires is relatively small， it can reduce the density of the arrangement.