The wheels shown are made of Nylon, Stainless Steel, or Steel.
The listings describe precision bearings, factory-greased and sealed bearings inside the wheel, and stainless steel ball bearings to support rotation.
Configurations include single-wheel assemblies, two-wheel designs, and tandem (dual-wheel) roller assemblies that distribute the load across two wheels.
Replacement rollers are supplied as a single roller unit or assembly. Several descriptions explicitly state mounting hardware and accessories are not included.
These rollers are described for screen doors, sliding doors (including patio sliding glass doors), and for residential and light-commercial sliding door applications.
