Roller Assembly for Sliding Patio Door
This Roller Assembly has Steel Ball Bearings
Its wheel is center grooved with a diameter of 1-1/4 inch
Its housing is constructed out of Steel and is adjustable
This design is used by several door manufacturers
Priced each, sold each

Housing Tab Style: U-Tab
Housing Width: 9/16-inch
Roller Diameter: 1-inch
Roller Edge Type: Concave
Roller Material: Steel
Roller Width: 5/16-inch

Contents
1 roller assembly

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