Euro White 4' Speedometer - 80MPH (Pitot) Perimeter-lighted White dial with bold Black graphics, Black aluminum bezel, contoured White pointer and flat glass lens. Pitot tube type speedometers operate by pressure from the water being forced into the pitot tube. This pressure is then transmitted through flexible tubing to the bourdon tube movement inside the speedometer head where it is converted into a speed reading by the movement mechanism. ∗Pitot tube sold separately. 4' - Hole Size: 3.375' (85mm) Specifications: * Anti-scratch glass lens * Plastic Cases for corrosion resistance and long life * Perimeter-lighted Black dial * Can be adapted for 24 VDC systems Factory P/N SE9474 *Sold as an Individual **Gauge Cover not Included