8 rolls of insulation tape. Pressure sensitive tape used to insulate electrical wires and other materials that conduct electricity. Stretches well and gives an effective and long lasting insulation. Contains 2 x black, 2 x red, 2 x grey and 2 x blue tape. Black is for Insulation, Low Voltage, Phase A. Red is for Low Voltage, Phase B. Grey is for Low Voltage Neutral/High Voltage Neutral. Blue is for Low Voltage, Phase C.