1.black and red speaker cable 2.4, 6, 8, 10, 12, 14, 16, 18, 20, ... is the transparent protective cover of PVC (Red of Black). This type of cable is applicable to acoustic equipment.specification:Item NO ... 2C 2.60×5.202,4,6,8 cores telephone cable, flat,white,black,grey,or any color100m/roll or ... 305m/roll100m/plastic spool or 305m/plastic spoolRed/black speaker cable, 4, 6, 8, 10, 12, 14, 16, 18, 20, ...