Ubited Safety Authority offers a wide range of NCHRP-350 compliant signs stands to meet every need. TwinFlex™ features a dual heavy duty upright spring system, DynaFlex™ stands have dual torsion springs, and UniFlex™ a single upright coil spring all designed to provide maximum stability in windy conditions. DynaLite™ stands, the Stacker™, and tripod stands are designed to be used under less windy conditions.