This is a Surplus Lot of FELT POLISHING CYLINDERS UNMOUNTED 5/8" X 5/8".  There are approximately 1900 pcs. Some have stains on one end. They are unmounted and are made to be used on a tapered mandrel or spindle. They appear to be concentric and very usable.  They can be used for polishing rock, glass, tile and metals, depending on what type of abrasive polish you use.