Factory supplied, not an aftermarket seal
CLOPAY T-End Bottom Rubber Seal ,"Clopay" T-End Bottom Rubber Seal Inserts , Designed for Clopay brand Garagee door retainers. Proprietary shape that is not like standard bottom seals. More flexible than vinyl. Conforms to uneven floors with over 1" compression. Contact insures tight seal. Saves money by reducing energy loss year round. Sizes available for all aluminum bottom seal retainers. 5/16" Clopay T-End only. 4-1/2" width,offered in stock 10',20',and 100' rolls. Installs quickly and easily in just minutes. 1yr Manufactures Warranty 5/16" T-End Clopay Rubber Seal
Brand: Garage Door Parts, Size: 4.5 Inch x 100 Feet