Track Brackets Steel Silver Galvanized Finish Length (In.) 2 3/16 in Height (In.) 2 3/16 in Width (In.) 2 3/4 in Depth (In.) 1 7/8 in Wheel Diameter Not Applicable Roller Width/Dia. (In.) No Roller Surface Mounting Mounting Hole Size (In.) 9/32 in Number of Wheels 0 Steel Hardware Included For Use With Sectional Garage Door 1 Pair