Out of the plastic boxes which are selling at present, it's ability and working efficiency are most excellent, the competitive power is much higher with the low price same as the level of steel box. The products were added the electromagnetic Interference (EMI) and preventing substance of the static electricity, and the strong point was given to the relevant mechanical protection of electricity, electron and etc. The use are possible according to the size such as small terminal box, signal, terminal and pull, control box etc.