7 colours, 4 metres each on a reel: black, red, yellow, blue, green, white and brown. Insulation: Silicone Conductor: Highly copper, oxygen-free 0.82mm² (18AWG) silicone wire; 150 flexible strands with 0.08mm tinned copper wire; very low impedance for efficient connection. High temperature silicone wire: -60 to +200 degrees Celsius. Rated voltage 600V; Charging current 7.5A