Grooved Roller Assembly for Sliding Windows.

This Roller is constructed out of Nylon / Steel
The Housing is Nylon
The Rollers are Steel
The roller surface is Grooved
This design is used by several manufacturers including H-R

Material: Nylon and Steel
Roller Diameter: 7/16 inch
Roller Edge Type: Grooved
Housing Width: 5/8 inch

Contents
2 roller assemblies

Priced and sold in pairs.