Complete hardware box for a double-wide garage door running extension springs. Covers 7-foot and 8-foot door heights, pick from the dropdown. Inside you'll find hinges, rollers, bottom brackets, pulleys, cables, safety cables, and the fasteners to put it all together. The rollers are 2-inch 11-ball nylon and the hinges are 14-gauge. This is for extension spring setups, not torsion. If your door runs on a torsion shaft above the opening, you need the torsion kit instead. Good for new installs or when the existing hardware is too far gone to reuse. Select your door height carefully.