Chesapeake White SS 2" Cylinder Head Temperature Gauge (60-220F)Perimeter-lighted White dial with stylish Blue and White graphics, polished stainless steel bezel, contoured White pointer and domed glass lens. A temperature gauge operates by sending a low amperage current through the gauge's meter to the ground via a sending unit with variable resistance. The resistance of the sending units increases or decreases with the changes in pressure, temperature, etc. 2" - Hole Size: 2.0625" (53mm)Specifications: Anti-scratch glass lens; Perimeter lighted back light; 12 VDC negative ground; Can be adapted for 24 VDC systems; Dual Scale - Imperial or Metric ; Factory P/N GP9454*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. - cis2:mm5mnJlm -Specifications: Gauge Type: Cylinder Head Temperature; Gauge Size: 2"; Series: Chesapeake White; Box Set: No; Voltage - Input Range (Volts): 12/24 V; Box Dimensions: 3"H x 3"W x 4"L WT: 0.4 lbs; UPC: 759266138063;