Sierra Amega 7K Tachometer 58255P3 in. gauge displays the revolutions per minute of an outboard or I/O marine engine. Amega 7K Tachometer 0-7000 RPM range 3 in. diameter Ideal for outboards and stern drives Amega series Black dial Red graduations White numerals Vivide white pointer staff Scratch resistant curved lens Black, near flush bezel US and metric scales where appropriate Perimeter and thru-dial lighting