1-1/2 inch steel ball bearing roller
Adjustable steel housing assembly
Used by Overseas, and other glass door manufacturers
Housing dimensions: thickness, 3/4 inch; length, 1-1/4 inch; height,1-5/16 inch; overall thickness, 13/16 inch.

Sold each, priced each

Diameter: 1-1/4-inch
Housing Tab Style: Plain Back
Housing Width: 13/16-inch
Material: Steel
Roller Diameter: 1-1/4-inch
Roller Edge Type: Concave
Roller Material: Steel
Roller Width: 5/16-inch
Type: Concave
Width: 13/16-inch

Helpful Article: How to Replace Rollers in an Aluminum Sliding Glass Door