M Spring Tension Roller Assembly with Pin & 1 Inch Nylon Wheel for Sliding Screen Door.
Roller Assembly consists of 1 inch nylon center groove wheel, heat treated, high tension, steel spring and 1/8 inch locator pin.
The Pin is meant to hold the Roller in a fixed position. 

If the screen frame corner is broken, replace the corner and wheel with part number 11008.

Spring Type: M-Spring
Roller Edge Type: Concave
Roller Material: Nylon
Roller Width: 1/4 Inch
Roller Diameter: 1 Inch

Contents: 1 Roller Assembly 

Priced and Sold as Each.