Ring insulated connector Material: Copper, brass Wire range: 0.5-6mm2 Max current:19-48A Material thickness: 0.75-1.0mm Ring insulated connector Material: Copper, brass Wire range: 0.5-6mm2 Max current: 19-48A Material thickness: 0.75-1.0mm Ring pre-insulating terminal (TQ-JTL)Brand NameCHDLModel NumberRVcolorred, blue, black, yellow