Discontinued item,  Must buy Egress Operator 
Pella Replacement Guide shoe for straight arm egress Operator
This is a Service part not sold by Pella,
Was originally used by in field service person as a repair part.

Top Length: 3/8 Inch
Bottom Length: 1-1/4 Inches
Material: Plastic / Nylon
Color: White

Priced and Sold Each.

Related Pella Hardware:
9040108 - Left Hand Operator
9040110 - Right Hand Operator