Right Weigh'S 510-46-C Interior Analog Load Scale Is Designed For A Tandem Axle Suspension With One Height Control Valve.After A Loaded Calibration At A Certified Ground Scale, The Gauge Will Reliably Display The On-The-Ground Axle Group Weight In Pounds. When Properly Calibrated And Used, Right Weigh On-Board Load Scales Are The Most Valuable Tool Available For Maintaining Safe And Legal Axle Weights. The 510-46-C Has A Chrome Trim Bezel, And Fits In A Standard 2-1/16 Dash Cutout. This Gauge Features A User-Programmable 7 Color Led Backlight For A Custom Look!