docs/partials/dial-image-background-css.mustache

.yui3-skin-sam .yui3-dial-content .yui3-dial-handle{
    background:url({{{componentAssets}}}/images/ball_bearing.png) no-repeat;
    opacity:1; /* Normally the handle is not full opacity in non-VML case */
}
.yui3-skin-sam .yui3-dial-content .yui3-dial-ring{
    box-shadow: none;
    -moz-border-radius: none;
    -webkit-border-radius: none;
    -moz-box-shadow: none;
    -webkit-box-shadow: none;
    background:url({{{componentAssets}}}/images/bkg_ring_of_lines.png) no-repeat scroll 0px 0px;
}
.yui3-skin-sam .yui3-dial-content .yui3-dial-center-button {
    box-shadow: none;
    -moz-border-radius: none;
    -webkit-border-radius: none;
    -moz-box-shadow: none;
    background:none;
}
/* Hide all the VML ovals in IE. */
.yui3-skin-sam .yui3-dial-ring-vml v\:oval {
    visibility:hidden;
}
/* Show the marker VML oval */
.yui3-skin-sam .yui3-dial-ring-vml .yui3-dial-marker-vml v\:oval {
    visibility:visible;
}
.yui3-skin-sam .yui3-dial-content .yui3-dial-ring-vml{
    background:url({{{componentAssets}}}/images/bkg_ring_of_lines.png) no-repeat scroll 0px 0px;
}
.yui3-skin-sam .yui3-dial-content .yui3-dial-handle-vml{
    background:url({{{componentAssets}}}/images/ball_bearing_8.png) no-repeat scroll 0px 0px;
}
.yui3-skin-sam .yui3-dial-content .yui3-dial-center-button-vml {
    background:url({{{componentAssets}}}/images/empty.png);
}