Deluxe model adjustable height threshold. Oak riser adjusts to seal gaps under your door from 1-1/8" to 1-3/8" Heavy duty aluminum and oak design assures years of protection from the elements. Installing a threshold will help to seal out drafts from the bottom of your door. A door sweep is recommended to be used with this threshold to provide the best weather tight seal. Helps make your home more comfortable and saves energy.