M-D Building Products 7179 36-Inch Flex-O-Matic Automatic Door Sweep
Premium quality aluminum and vinyl -Inch Self-Raising-Inch door sweep. Durable powder coat bronze finish and flexible vinyl insert.  Helps make your home more comfortable and saves energy. Sweep installs on the inside bottom edge of your door.  Recommended for use with smooth top thresholds or thresholds with vinyl inserts.  Fasteners are included.