Seal Rail:

Category: L-Shape garage door weather seal retainer/rail
Features: Lightweight and Economical bottom retainer solution for mounting weather-stripping.
Material: Plastic

Weather Stripping:

Description: Bottom Seal For Garage Doors - Weather Stripping Rubber Seal
Set-up:  16ft Overall Length (Width 3.75") 
Material: Rubber 
Heavy-duty weather seal stays flexible from 40° to 140° for a tight seal