Allentare Black 60MPH 3-3/8 85mm Pitot Speedometer 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. Mounting Hardware Included. Voltage 12V. Diameter 3-3/8 . Diameter Metric 85mm. Input Type Mechanical. Max Range Outer Scale 60 MPH Allentare marine gauges provide an ideal, cost effective solution for new boats or drop-in replaceme Connection M4 Stud. Mounting Hardware Included Voltage 12V. Diameter 3-3/8 Diameter Metric 85mm. Input Type Mechanical Max Range Outer Scale 60 MPH