Autometer makes checking your fuel level easy with their gauges. Their patented air core meter movement receives extra dampening to help combat effects of fuel slosh in non-baffled tanks. SPECIFICATIONS-Traditional Incandescent Lighting Illuminates Around the Perimeter of the Dial-Works With Most Pre-1989 (Pre-1987 Mustang) Ford & Most Chrysler-Autometer has Proven Track Record in Delivering Quick & Accurate Readings-12 & 16 Volt Compatible, Compatible with Nearly Every Street & Race Car Electrical System-Gauge Kit Includes Bulb & Socket Assemblies, Red & Green Bulb Covers, Mounting Hardware & Detailed Installation Instructions-Light Covers: Red 3214 & Green 3215-Mounting Hardware: 2230-Bulb & Socket: 3220-Size: 2-1/16" (52.4mm)-Type: Air-Core-Range: 73 Empty / 10 Full (Non-Linear)-Lighting: Incandescent