The M-D Premium Rubber Top and Sides Door Seal fits doors with a kerf/channel to protect against drafts moisture dust and insects. Exceptional material memory of the premium rubber allows for long-term durability. Save on energy by sealing the top and sides of your door and keeping the heat or air conditioning from escaping. This premium door seal remains flexible in extreme temperatures. The heavy-duty design protects against puntctures and tears caused by pets and every day use. The kerf design is easy to install by simply pressing it into the channel of the door stop. No hardware required. Before installation cut to desired length using scissors.