ELECTRIC MOTOR MODEL/COLOR WHEEL, 1.5-3V • This unit can be used with both electrical and optical Physics demonstrations • Open model type with 3-pole DC armature wound with enameled copper wire • Revolves between 2 curved, painted iron stands • Motor has 10 x 10cm plastic base with rubber feet and two 4mm socket terminals • Size: 5½” x 4¾” x 4-1/3: (140 x 120 x 110mm); runs on 4.5 to 3V DC, 2 to 3 amp power supply • Color disc included