Chesapeake Black 2 Ammeter Gauge -60 to 60 AMPSPerimeter-lighted Black dial with stylish Blue and White graphics, polished stainless steel bezel, contoured White pointer and domed glass lens.An ammeter indicates the current flow through the battery charging system. A zero center ammeter, during chargine, shows a positive reading indicating the current is flowing to the battery charge. A - negative reading indicates current flowing away from the battery discharge.2 - Hole Size 2.0625 53mmSpecifi