Torsion Spring Winding Rods Steel Silver Steel Finish Shaft Length 16 in Length (In.) 16 in Height (In.) 16 in Width (In.) 1/2 in Depth (In.) 1/2 in Wheel Diameter 1/2 in Roller Width/Dia. (In.) No Roller Surface Mounting Number of Wheels 0 Hard Drawn Wire Hardware Not Included Requires Hardware For Use With Sectional Garage Door 1 Pair