P720 28 in. Plug-End Extension Spring (0.177 in. No. 7 Wire), E900 Hardware, Mfr#: P720

P720 20 in. Plug-End Extension Spring is a Holmes spring replacement for lighter 1-piece garage doors as well as for toy haulers using lift springs. We recommend replacing all springs at the same time for balanced door lift and even wear. A c-hook is required for a single spring installation while a w-hook is required for a double spring installation – available separately.