Pair of extension springs sized 44 by 60 inches for 10-foot-high garage doors. These work on doors weighing anywhere from 80 to 280 pounds. Extension springs mount on each side of the door along the horizontal track, unlike torsion springs that sit above the door. When they stretch out and lose their pull, the door gets heavy and the opener works overtime. Always swap both sides at the same time. Some sizes may have a lead time, so contact us to check before ordering. Make sure your door is actually 10 feet tall and weigh it if you can to pick the right spring. Please verify sizing and fitment before ordering.