This is an entry door threshold weather stripping that slides or pushed into the bottom of door with the two upright inserts. Inserts set 1 inch apart. Bottom plate to the bulb is 1 1/2 inches, bulb is on inside edge.
Bob from SWISCO responded:
January 20, 2021
Check out our selection of prime door sweeps here. I recommend the 58-176 or 58-186 in most cases. This sweep wraps around the bottom of the door and is mounted on one side. See what you think.