2 x 1.5 mm² red / black cable. Braided without sheath, very low capacity, halogen free. KAL21 is an unsheathed twisted pair cable. Its passage consists of more than 25 turns between the drivers. It is recommended for use as a DC power supply unit or data bus and fire detection. Working temperature: -20ºC to 85ºC. Price per meter (Supplied in rolls of 100 meters).