Flat Roller Assembly for Sliding Windows.

Both the Top and Bottom rollers are adjustable
This Roller is constructed out of Nylon and Steel
It is installed on the vertical rail
The Housing is Nylon
The Rollers are Steel
The Roller surface is Flat
This design is used by manufacturers such as Hilite (200 series)

Material: Nylon and Steel
Roller Diameter: 1/2 inch
Roller Edge Type: Flat
Housing Length: 1-15/16 inch

Contents
2 Roller assemblies

Priced and sold in pairs.