Designed with seamless dashboard mount. Range of the sport-compact in-dash tachometer gauge is 8000 RPM. Built to meet high standards and the toughest conditions. Operates on 4, 6, and 8 cylinder engines with points, electronic, and most high performance racing ignitions with 12 volt power. Size of the sport-compact in-dash tachometer gauge is 3-3/8 (85.7mm). Made in the USA