Terminal marker can add to indicate each position with its function and to caution people avoid any mis-operation;

Transparent top PC cover can reach IP20 protection from top and can let people easy to see inside clearly;

Middle PA cover with different color to indicate different line clearly;

Steel screw with inner hexagonal head which is much stronger. One big screw is for incoming copper bar and two small screws are for outgoing wire/cable;

High quality acid-washed brass;

The Base(PA) engraved with all kinds of technical data including torque, acceptable wire/cable size, certificate;