Faria Dress White 4" Speedometer (F33112) This perimeter-lit white dial has striking black graphics, a white aluminum bezel, a contoured black pointer, and pitot tube-style speedometers with flat glass lenses. They work by forcing water into a pitot tube under high pressure. The movement mechanism converts the pressure into a speed readout in the speedometer head. Faria Beede Instruments has been manufacturing gauges for over 50 years (since 1956), growing from a company that primarily produced tachometers for the marine and automotive industries to one that currently serves a wide variety of global markets with a diversified spectrum of analog and digital engine monitoring instruments. Key Features: Dress White Speedometer 0- 55 MPH 12 VDC ground Scratch-resistant glass lens Adaptable to 24 VDC systems Dual Scales - Imperial and Metric Strong and durable construction Marine-grade approval Constructed using superior materials Engineered to exacting specifications Specifications: Brand: Faria SKU: F33112 Weight: 0.54 LBS Style: Dress White Gauge Size 4" Measurement Limit: 55 MPH Operating Temperature: -22 degreeF to +185 degreeF Storage Temperature: -40 degreeF to +221 degreeF Mounting Hole: 3-3/8" (85 mm)