National Hardware 7690 Number Garage Door Extension Springs with Safety Cables, 25-Inch x 150-Pound, Black
This is a replacement spring for 150-Pound doors with extension springs. Read and understand all instructions before weighing the door and replacing the spring. This spring is painted black and includes the safety cable which, when properly installed, helps prevent injury and property damage by containing the extension spring should it happen to break under tension. To keep the door balanced, always replace the springs on both sides of the door.