CUSTOM PREVIEW - you can change this in the previewTemplate option

.icon-bg:

.icon-close:

.icon-down:

.icon-facebook:

.icon-github:

.icon-github_small:

.icon-instagram:

.icon-open:

.icon-right:

.icon-right_sm:

.icon-twitter:

.icon-twitterbird:

Embedded SVG option

(The data-grunticon-embed attribute tells grunticon to inject SVG inline):

icon-burger:

icon-burger (styled variation):