Prime-Line Products D 1762 Sliding Door Roller Assembly with 1-1/4-Inch Steel Ball Bearing 1-1/4 In. O.D. Steel ball bearing center grooved roller Housing dimensions: W: 3/4 In. L: 2-1/8 In. H: 1-3/16 In. Overall thickness: 7/8in. Fits Nu-air Aluminum and other glass door manufacturers