Prime-Line GD 12227 Garage Door Torsion Spring, .218 inch x 1-3/4 inch x 20 Product Description This torsion spring is constructed of steel and it includes a stationary cone and a winding cone attached to opposite ends of the spring. These types of torsion springs provide lifting force for heavy garage doors and must be selected by the spring?s dimensions, rather than the door?s weight. See the product specifications with illustrations found in Prime-Line?s Torsion Spring Selection Guide to assure that the proper replacement spring has been selected. In the case of dual spring installations, note that the proper use of LEFT WIND and RIGHT WIND springs is imperative. Also, when dual spring installations are involved, it is important to replace both springs, as replacing only 1 spring may add increased strain to the older non-replaced spring. This torsion spring is a regular duty spring with an estimated lifetime rating of 10,000 cycles. As an important safety precaution: all broken or malfunctioning hardware should be replaced with matching hardware, without any modifications. These garage door torsion springs can cause serious injury if not handled and installed properly. If attempting to replace the torsion springs yourself, it is important that the removal or adjustment of torsion springs is not attempted with any other tool other than Prime-Line?s item number GD-52238. Failure to utilize Prime-Line?s item number GD-52238 for the replacement of these springs may result in severe personal injury. These winding rods are used to wind and unwind the tension on torsion springs and they are the only tools recommended for this purpose. Note: To determine the handing of your torsion spring wind, look at the end of the spring with the ?finger? of the spring at the top of the wind. When the end of the spring is at 12:00 oft.clock and it is pointing to the left, the spring is a right wind; if the end of the spring points to right (positioned at 12:00 oft.clock) it is a left wind. When standing inside the garage looking outside, the torsion spring with the black painted winding cone installs on the right side of the door, and the torsion spring with the red painted winding cone installs on the left side of the door. From the Manufacturer This torsion spring requires the use of two winding rods. It comes in a blue finish with a .218 wire size and a 1-3/4 in. inside diameter. It features a left handed wind and 20 in. length. Features Used by a variety of garage door manufacturers 0.218 in. wire size x 1-3/4 in. inside dimension x 20 in. length with blue color code When dual spring installations are involved, it is important to correctly install both the left and right wind springs during the same job Spring includes stationary and winding cones, replacement requires use/purchase of Prime-Line part GD-52238 and a clear understanding of wire size and handing Left hand wind springs are mounted to the right of center (as viewed from the inside the garage looking out) 1-3/4 in. inside diameter USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.