Image Item No. Description  3142c01  Electric, Motor 4.5V 17 x 6 x 5 with Switch Catalog: Parts: Electric, Motor  3691  Electric, Motor 4.5V Housing 4 x 4 x 3 Catalog: Parts: Electric, Motor  6216m1  Electric, Motor 4.5V Type 1 for 2-prong connectors without Middle Pin Catalog: Parts: Electric, Motor  6216m2  Electric, Motor 4.5V Type 2 for 2-prong connectors with Middle Pin Catalog: Parts: Electric, Motor  x507  Electric, Motor 4.5V/12V Bush with Black Metal Casing (Train) Catalog: Parts: Electric, Motor  2838c01  Electric, Motor 9V 5 x 4 x 2 1/3 with Dark Gray Base Catalog: Parts: Electric, Motor  2983  Electric, Motor 9V Micromotor Pulley Catalog: Parts: Electric, Motor  71427c01  Electric, Motor 9V Mini-Motor, Heavier Weight Catalog: Parts: Electric, Motor  43362c01  Electric, Motor 9V Mini-Motor, Lighter Weight Catalog: Parts: Electric, Motor