Fits 36" length of bottom door frame (Net Length 35-1/2) Fits ONLY 1" Thick door frame on the bottom of security door Comes black or white Weatherstripping seal included in order to keep out dirt / debris and allow air to stay inside. *SCREWS INCLUDED* Made in the USA These expanders are custom cut to fit a 36" security door (Net Width 35-1/2). They come with weatherstripping in order to help create a seal at the bottom of the door to keep out dirt, debris, and keep air in. Can ONLY fit doors with a 1" thick frame at the bottom. Made in the USA.