2" Voltmeter (16-36V) - Black Bezel with Orange PointerVoltmeter Hole Size:  2" - Hole Size: 2.0625" (53mm)A voltmeter indicates the battery voltage and the general condition of the battery charging system. The meter requires no warm-up and indicates voltage changes instantly.Voltmeter 16-36V w/ notched case 2" Onan. Used in 24v applications only. Includes fire orange pointer, tall black aluminum bezel, flat glass lens, case with locator keyway to ensure proper installation and perimeter lighted black dial with stylish white graphics.Features:2"16-36VBlack BezelOrange Pointer