QuickCar's Redline Oil Pressure Gauge is a 2-5/8" electric stepper motor gauge that features an adjustable warning level. The warning function changes the backlighting from white to red and flashes. The lightweight plastic casing is perfect for high performance uses. Gauge includes mounting hardware. 69-003 does not include 0-100psi sending unit (Pt.# 63-230) that is required for the gauge to function.