Roller assembly with 1 inch nylon wheel for sliding screen door.
Roller has aluminum housing, center groove wheel 

Housing Length: 2-1/4 Inch
Housing Width: 5/16 Inch
Roller Diameter: 1 Inch
Roller Width: 1/4 Inch
Roller Edge Type: Concave
Roller Material: Nylon

Content: 1 Roller Assembly

Priced and Sold each.