Roller Wheel Bracket Assembly, Carriage Height 0.5 in, Carriage Length 3.125 in, Carriage Width 1 in, Carriage Material Aluminum, Roller Material Nylon, Requires Lubrication Lubricant Not Required, Carriage Type Roller, For Use With Door Frames, Linear Glides, Track Systems, Series 10, Operating Temperature - Maximum 150 Degrees F, Operating Temperature - Minimum 0 Degrees F, Carriage Finish Anodized, Roller Finish Anodized, System of Measurement Inch