SL730 30 in. Lock-End Extension Spring (0.177 in. No. 7 Wire), E900 Hardware, Mfr#: SL730

The E900 HARDWARE SL730 30 in. Lock-End Extension Spring is a Holmes spring replacement for one-piece garage doors. 2 x SL730 springs handle up to a 150 lb. door while 4 x SL730 springs handle up to a 300 lb. door. SL730 springs are also a popular installation for toy hauler doors.