This left wound torsion spring from Garage Door Supply Company is .243 in. x 2 in. x 34 in. in size. If you're not sure what size to order, contact on in-house pros for free tech support from our U.S. company headquarters. If you have a double garage door and one spring goes bad, the other is likely to go bad soon, so we suggest ordering two. Order a left wound torsion spring (usually marked with black paint) to replace a worn spring on the right side of the bracket. Order a right wound spring (usually marked with red paint) to replace a worn spring on the left side of the center support bracket. Enjoy lower prices on all replacement garage door parts for residential and commercial doors.Product Highlights: