They are electric and will not read properly until power is applied. The panel is new old stock but the paint was peeling off. It was stripped and repainted. For modified, custom or racing applications only, not factory replacements.Please wait for an invoice, or send request for a total. The item "Vintage STEWART WARNER Heavy Duty Gauge Set Rat Rod Gasser Mopar Ford GM" is in sale since Tuesday, November 26, 2019. This item is in the category "eBay Motors\Parts & Accessories\Vintage Car & Truck Parts\Gauges". The seller is "68hemirt" and is located in Wichita, Kansas. This item can be shipped worldwide.