1) High impact resistance material 2) Transparent covering 3 ... ) Plenty of space for Specifications and features of distribution box: 1) High impact resistance material 2) Transparent covering 3) ... 5)Single or double row of copper6) Range: 4, 6, 8, 10, 12, 15, 18,20,24, 30 ... for the installation of terminal substitution rail, button box, small terminal, sigal, relay and sensor, communication and ...