RIGHT-HAND wind springs are mounted to the left of center (as viewed from the inside the garage looking out) DIMENSIONS: 0.250 inch wire size x 2 inch inside dimension x 28 inch length with gold color code INSTALLATION: 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 DURABILITY: Typical life-span for this garage door spring is 10,000 cyles of opening or closing your door Matching left hand wind torsion spring is Prime-Line part GD 12322 NOTE: Make sure to double check the dimensions on this spring and compare it with your existing spring before ordering