Use 2 of these springs on an old-style wooden door, or a heavy wind-rated 16x7 door. Install just one spring on a builder grade 26 gauge steel 16x7 garage door.
*Use the dropdown menu to select a single left side spring, a pair of springs, or just the one on the right side. When purchasing a single spring you must select left or right side. The correct orientation would be from standing inside the garage looking toward the garage door.