3 Gauge Set 52mm Fuel Water Temp Volt 7 Colors & Metal Switch Panel For Caravan. 3 Gauge Set 52mm Fuel Level Gauge Water Temp Gauge Voltmeter with 7 Gang Metal Switch Panel For Caravan. ALUMINUM SWITCHES & PANEL? The 7 gang switches panel can be applied to DC12V or DC24V operating voltage, the aluminum panel, it can fit various automotive vehicles. Each switch has a blue buckle on both sides, they are premium pc materials, will keep the switches on panel tighter, prevent the toggle switches from falling off during your driving, perfectly adapt to the bumpy environment. This car switch panel is with a pre-wired design to control various led lights and equipment, easy to install, and they are universally applied to many cars, RVs, motorcycles, buses, trailers, jeeps, UTV, etc.