[slider] how to get unique IDs or classes on range slider handles

I am using a range slider and dont get unique classes on the two
sliders, but I see mention of '.ui-slider-range-min' and max in the
css. How can I set up the slider so that I get these unique
identifiers? I dont see them in any of the demos either. I was able to
use simple JQ to insert them, but would like to eliminate that DOM
crawl. Thanks!!