Dometic Optima Ground Support -WhiteDometic Optima Ground Support White Dometic A&E Optima Ground Support System Choose Satin or Polar White Finish. Stabilizes and improves the look of longer awnings by eliminating inherent sag. Keeps the awning fabric taut automatically and triple function design supports the extended awning canopy, the roller tube, and the rolled up awning in the travel position. Center support stays attached to the tension rafter, cannot fall out of the roller tube