Residential garage door torsion spring with 0.218-inch wire and cones already fitted. Select from 1 3/4-inch and 2-inch inside diameters and lengths ranging from 20 to 50 inches, then choose left wind, right wind, or a pair. The spring is suitable for standard residential torsion assemblies and carries an approximate 10,000-cycle rating. Measure the existing spring while it is relaxed so the replacement size matches correctly.