I have them on a 8 foot door. They stretch out to 71 inches with the door closed seem to work just fine. I do have a safety cable passing through the springs.
I ordered and received a Gear and Sprocket Kit for my 3/4hp 15 yr old Craftsman Opener as the chain sprocket had broken off the drive gear assembly making the opener inoperable.
Preferred Doors had the kit that I needed at a very reasonable price and also being in Texas made the delivery time very acceptable. Received the order within 3 days and was exactly what I needed to return my Opener to “like new” again. Thanks to all at Preferred Doors for the prompt service and great pricing.
Easy ordering process! Received in a timely manner! Perfect fit! Very reasonable price! Will order from Preferred Doors for future needs, and will recommend Preferred Doors to others!!