GlowShift Black 7 Color 10,000 RPM Tachometer Gauge - For 1-10 Cylinder Gas Powered Engines - Black Dial - Clear Lens - 2-1/16" 52mm 2 1/16 Inch (52mm) Black Face Gauge with a Magnified Lens Reads from 0 to 10,000 RPM 7 Solid Color Settings and Two Color Cycle Modes with Dimmer Function that Allows the Gauge to Dim 30% Installs to any 1-10 Cylinder Gas Powered Engine Mounting Hardware, Installation Instructions, Free Lifetime Technical Support & One Year Limited Warranty