CSS classes for the Gauge control are as follows:

Class	Description
.wj-gauge	Styles the div host element of the Gauge control.
.wj-gauge .wj-pointer	Styles the gauge pointer.
.wj-gauge .wj-ticks	Styles the tick marks, which are displayed when the ShowTicks property is set to true.
.wj-gauge .wj-min	Styles the min value text, which is displayed when you set the ShowText property to MinMax.
.wj-gauge .wj-max	Styles the max value text, which is displayed when you set the ShowText property to MinMax.
.wj-gauge text	Styles the text displayed on the Gauge control, which is displayed when you set the ShowText property to Value.
.wj-gauge svg	Styles the div host element of the SVG.
.wj-lineargauge	Styles the div host element of the linear gauge.
.wj-radialgauge .wj-value	Styles the text displayed on the Radial gauge control, which is displayed when you set the ShowText property to Value.