The Zetor 78358940 is an original equipment manufacturer (OEM) tachometer designed for Zetor tractors with a maximum speed of 40 km/h. This essential instrument provides precise measurements of both engine revolutions per minute (RPM) and ground speed, crucial for optimal tractor operation and maintenance. Manufactured to Zetor's rigorous standards, it ensures reliable performance and direct fitment, maintaining the integrity of the vehicle's dashboard instrumentation.