"Use this steel left-hand wound torsion spring to replace broken garage door springs of matching dimensions. It includes mounted stationary and winding cones with .243" wire size x 1-3/4" inside dimension x 32" length with red color code. This torsion spring is a regular duty spring with an estimated lifetime rating of 10,000 cycles. 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 ensure that the proper replacement spring has been selected. 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 adjustme