... We make Rod type(ED type), Dumbbell type(DB type),U type, W type (Three Phase type), Solid Rod type, Spiral type and 5 piece type (dual hot zone ... customers double helical type,slotted-type, the hot and cold end welding department gradient type UL type , mega-rod and mini-rod ,mega- ... Rod diameter of up to 80mm, length above 4m; mini-rod ...