29mm Panel Mount USB + Volt Meter
National Luna has an entire line of 29mm diameter accessories, ranging from gauges to outlets. They are compatible with the 29mm spare locations on the Auxiliary Battery Box and 12V Auxiliary Distribution Box. You can also mix and match these accessories and wire them independently in your vehicle, utilizing the flush and surface mount covers we have available as well.
Hole Diameter: 29mm (1.14")