Mechanical indicators are the most accurate method of monitoring the position of your sterndrive, outboard, or trim tab. Unlike electric trim gauges, they are mechanically operated by a 33C push-pull cable, eliminating the need to rely on the irritating "floating" needle of a trim gauge. All indicators feature all billet aluminum construction including fully customizable faces. For a complete mechanical indicator system you must purchase the indicator as well as an actuator, a 33c cable and transom cable seal for each drive or tab you wish to monitor.