Wire Connectors ◆ Poly carbonate, UL 94V- 0 flame-retardant shell. ◆ Stainless steel elastic plate, high conductivity cupper plate to connect wires. ◆ Insert wires after peeling the coat. ◆ Suitable for solid wire and strand wire, resuable(can insert wires of biggerdiameter than the ones striped out) ◆ Suitable for fixing wires for lighting and electrical construction.