... - Plain annealed flexible copper conductors, PVC insulated, mylar taped, tinne CY Control Cable 0.75mm to 16mm Control Cables - Plain annealed ... overall diameter.Core identification : 2 core - Black with White numbers. 3 core and above - Black with White numbers plus Green/Yellow ... available with colour codes as follows : 2 core - Blue, Brown, 3 core - Blue, Brown, Green/Yellow, 4 core - Blue, Brown, ...