Prime-Line 25 in. L 150 lb Garage Door Extension Spring

Heavy duty (10000 cycles) extension springs have double loop ends for extra durability. 5 sizes will replace most all spring configurations on residential doors that are no higher than 7 feet. 1/8 inch galvanized carbon steel aircraft cable installed through springs to prevent injury in case of breakage. Replaces most 7 ft. residential garage door configurations 1/8″ galvanized carbon steel cable This extension spring replaces most 7 ft. residential garage door springs. It features a 1/8″ 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.