Another successful product line were the battery-electric factory flat trucks, small vehicles designed for transporting goods inside factories, where the exhaust fumes of an internal combustion engine could not be tolerated. The truck consisted of a flat load bed, with a battery box and wheels underneath. One set of wheels was driven, and the other steered, with the motor positioned between them. The prop-shaft went down the middle of the two battery boxes to the driven wheels. At the steered end was a driver's platform, with a steering tiller (like a narrowboat) and controller, with foot pedal operating brake and on/off switch. A 3/4 ton example can be found on the Embsay and Bolton Abbey Railway.