There is great potential for heat / cooling loss at the top of any garage door. This product is a very good option in combating this.
The leading edge width is 3/4 inches and made of hard PVC material. It is attached to the flexible vinyl material that is 1-3/4 inches wide.
Installed on the top of the door: The hard PVC portion of the seal is attached to the top of the door, as the door closes, the 1-3/4″ vinyl seal bends back making contact with the header of the structure. This results in a very good seal and is typically used in conjunction with side seals mounted on the outside.