Universal Ammeter Gauge 12V 60-0-60 AMP Description 55mm Ammeter Gauge Scale: 60 - 0 - 60 Back-Lit for Night Operation Includes Mounting Bracket Mounting: Mount directly on cable Works: 12 volt systems Hole Diameter: 2 Inches Meter OD: 16 Inches Meter depth from front of panel to the end of the mounting studs is 15 Inches / 16 Inches Diameter: 52mm/2inch Inside Diameter of The Screen：43mm / 17 inches Outside Diameter of The Screen：56mm / 22 inches Weight: Gross Weight: 98g Package includes: One Ammeter Gauge Meter