1-1/8 inch steel ball bearing roller
Adjustable steel housing assembly
Used by several glass door manufacturers
Housing dimensions: thickness, 3/4 inch; length,2-5/16 inch; height,1-1/4 inch; overall thickness, 7/8 inch.

Diameter: 1-1/8-inch
Housing Tab Style: K-Tab
Housing Width: 3/4-inch
Material: Steel
Roller Diameter: 1-1/8-inch
Roller Edge Type: Concave
Roller Material: Steel
Roller Width: 5/16-inch
Type: Concave
Width: 3/4-inch

Priced each

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