Prime-Line GD 12207 Sectional Door Extension Spring with 22 inch Cable, Silver Product Description This extension spring replaces most 7 ft. residential garage door springs. It features a 1/8 in. galvanized carbon steel cable that is installed through the spring to prevent injury in case of breakage. This spring is used on a 4 panel garage door. From the Manufacturer This extension spring replaces most 7 ft. residential garage door springs. It features a 1/8 in. galvanized carbon steel cable that is installed through the spring to prevent injury in case of breakage. This spring is used on a 4 panel garage door. Features Found on a variety of 4 panel 4 section garage door Special for Frantz garage doors Includes safety cable Silver color tip 2 springs will lift a door weighing 150 lbs. maximum 22-1/2 in. length USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.