Optional wiring set for LED unit base only sold by 4TIL (0.5 mm and 1 mm) mixed plant fiber optic wire x1 bundle x10 11.8 inches (30 cm); Connection cord x1 19.7 inches (50 cm); Interboard connection cord x1 19.7 inches (50 cm); Compatible models of Space Battleship Yamato models and gun shooting unit, WW2 only. Not applicable unit: Not compatible with Star Destroyer 2 type units (gray wire will result in a boost over the allowable input and the LED bulb will break. Only white wire terminal connections are available. )