New in original factory package. Used on single car fiberglass garage doors Rated for 10,000 cycles Includes safety cable Yellow color tip 2 springs will lift a door weighing 70 lbs. maximum Product Description This heavy-duty (10,000 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 ft. tall. 1/8 inch galvanized carbon steel aircraft cable; installed through springs to prevent injury in case of breaking. 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 single car fiberglass door