The wiring terminal is designed into bolt pressing cable, good electrical connecting feature, low overheat and more safety.Modular design, the function components could be assembled freelyThe panel and fixing frame takeseperate structure avoiding polution when operating.Made of imported Polycarbon material, firmer, impact resistence,fireproof and safetyTheswitches take silver alloy jointThesockets take phosphor bronze clip and design of anti single-pole insert.Optionalsize: 118*73mm, 155*73mm, 195*73mm,120*120mmNormal models: 118type, 154 type, 195type and120type