National Hardware® N281-089 Garage Door Extension Spring, 25" x 140 lb, BlackBlack garage door extension spring with safety cables. For 7' high doors with 25" springs weighing 140 lb blue. For most garage doors with extension springs. 7690 25" x 140 lb Black garage door extension spring with safety cables For 7' high doors with 25" springs weighing 140 lb blue For most garage doors with extension springs Boxed.