Extension Spring Steel Silver Galvanized Finish Cable Size 1/8 in Length (In.) 1/8 in Height (In.) 1/8 in Width (In.) 144 in Depth (In.) 1/8 in Wheel Diameter Not Applicable Roller Width/Dia. (In.) No Roller Internal Mounting Mounting Hole Size (In.) 1/8 in Number of Wheels 0 Galvanized carbon steel aircraft cable Hardware Included Requires Needs Cable Clamps For Use With Sectional Garage Door 1 Pair