Image Item No. Description  2133  Electric, Motor 4.5V 21 x 8 x 4 1/3 Tuneable Catalog: Parts: Electric, Motor  47154c02  Electric, Motor 9V 4 x 4 x 3 1/3 with Black Conducting Plate and Dark Gray Base Catalog: Parts: Electric, Motor  45805c01  Electric, Motor RC with Flexible Superaxles Catalog: Parts: Electric, Motor  5313a  Electric, Motor Rechargeable 4 x 8 x 1 2/3 (Track System) Catalog: Parts: Electric, Motor