Vertical brush seal
A home owner from Gulfport, MS says:
June 22, 2016
The brush seal fits on a track build into the store's front double doors. The seal runs vertical and seals the space between the double door.
Paul from SWISCO responded:
June 24, 2016
Thanks for posting. Check out our 58-091. This is a commercial door weatherstrip that is commonly used between two commercial doors. It has a base width of 1/8" and a pile height of 7/16". See what you think!