Euro Black 4" Speedometer - 55MPH (Pitot)Perimeter-lighted Black dial with bold White 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 SE9463*Sold as an Individual**Gauge Cover not IncludedThis product may not be returned to the original point of purchase. Please contact the manufacturer directly with any issues or concerns. Specifications: Gauge Type: Speedometer Series: Euro Black Voltage - Input Range (Volts): 12/24 V Gauge Size: 4" Box Set: No Box Dimensions: 5"H x 6"W x 6"L WT: 0.6 lbs UPC: 759266328105 Quick Guide (pdf)