Large "U" Channel. Many uses, including windshield base on early cars. 15/16" wide X 3/4" deep; 13/16" inside channel width. Sold by the foot
Fit perfectly. Seals better than original door seals 25 years ago. Drove to the mountains and was astounded at the lack of wind noise coming into the cab of the old 86 Toyota. Clean up your door and cab contact points, install with care and you will be very pleased.