Allentare Black Trim Gauge For Use w/Mercury/Volvo/Yamaha 2001 Engines 12V Black Bezel. Allentare marine gauges provide an ideal, cost effective solution for new boats or drop-in replacement gauge for older boats. Allentare gauges are designed to work with most commonly found marine senders and wiring harnesses used today. Features Connection M4 Stud. Input Type Analog. Mounting Hardware Included. Diameter 2-1/16 . Diameter Metric 52mm. Voltage 12V. Max Range Outer Scale Up Allentare marine gauges provide an ideal, cost effective solution for new boats or drop-in replaceme Connection M4 Stud. Input Type Analog Mounting Hardware Included. Diameter 2-1/16 Diameter Metric 52mm. Voltage 12V Max Range Outer Scale Up